みんなde心電図 Downloads & Revenueみんなde心電図 · App Store & Google Play
みんなde心電図 gets 500+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
みんなde心電図 by Ryoma Kamei is on App Store and Google Play. Active Users (MAU & DAU), Downloads, rankings, keywords, revenue, and rating totals.
📦iOSUpdated to version 3.0.0📈AndroidEntered the top 100 in 2 charts📈AndroidCharting in a new country in 2 charts📦AndroidUpdated to version 3.0.0📦iOSUpdated to version 2.3.6📈iOSEntered the top 10📦AndroidUpdated to version 2.3.6✏️iOSNew iPad screenshots✏️iOSNew screenshots✏️AndroidDescription updated✏️AndroidShort description updated📈iOSEntered the top 100🆕iOSFirst spotted by AppInsider🆕AndroidFirst spotted by AppInsider🆕iOSIts developer released another app: 不整脈アカデミア🆕AndroidReleased on Google Play
Full timeline · 43 events
- 📦みんなde心電図 updated to version 3.0.0iOS【大型アップデート！新機能「TURBO」登場！】
心電図学習をさらに楽しく、効率的にする新機能を追加しました！
・最難関「マイスター」レベルを追加
・検定試験モードを追加
・医師・臨床検査技師国家試験レベルを追加
・個人成績表、分野別成績分析を追加
・AIによる心電図レベル判定機能を追加
・お気に入り問題の保存・復習機能を追加
・タイムアタックモードを追加
・全国ランキング機能を追加
・TURBO会員限定でクリエイターEXPが2倍に！
その他、軽微な不具合の修正と動作の改善を行いました。
今後も新しい問題や機能を順次追加予定です！… more - 📈みんなde心電図 entered the top 100 in 2 chartsAndroidTop Grossing · Medical · AE · Top Grossing · Medical · IN
- 📈みんなde心電図 charting in a new country in 2 chartsAndroidUnited Arab Emirates · India
- 📦みんなde心電図 updated to version 3.0.0Android【大型アップデート！新機能「TURBO」登場！】
心電図学習をさらに楽しく、効率的にする新機能を追加しました！
・最難関「マイスター」レベルを追加
・検定試験モードを追加
・医師・臨床検査技師国家試験レベルを追加
・個人成績表、分野別成績分析を追加
・AIによる心電図レベル判定機能を追加
・お気に入り問題の保存・復習機能を追加
・タイムアタックモードを追加
・全国ランキング機能を追加
・TURBO会員限定でクリエイターEXPが2倍に！
その他、軽微な不具合の修正と動作の改善を行いました。
今後も新しい問題や機能を順次追加予定です！… more - 📈みんなde心電図 entered the top 10AndroidTop Grossing · Medical · JP
- 📈みんなde心電図 entered the top 100 in 7 chartsAndroidTop Grossing · Medical · ID · Top Grossing · Medical · MX · Top Grossing · Medical · NL · Top Grossing · Medical · SA · +3 more
- 📈みんなde心電図 charting in a new country in 7 chartsAndroidIndonesia · Mexico · Netherlands · Saudi Arabia · +3 more
- ✏️みんなde心電図: app got biggeriOS144 MB → 169 MB (+17%)
- 📦みんなde心電図 updated to version 2.3.6iOSより快適にご利用いただけるよう細かな修正を加えました。
- 📈みんなde心電図 entered the top 10iOSTop Grossing · Medical · JP
- 📦みんなde心電図 updated to version 2.3.6Androidより快適にご利用いただけるよう細かな修正を加えました。
- ✏️みんなde心電図: new iPad screenshotsiOS· JP
- ✏️みんなde心電図: new screenshotsiOS10 screenshots (was 10) · JP
- 📦みんなde心電図 updated to version 2.3.5iOSより快適にご利用いただけるよう細かな修正を加えました。
- 📦みんなde心電図: now updating weeklyiOS4 updates in 30 days, after a quiet two months
- 📦みんなde心電図 updated to version 2.3.5Androidより快適にご利用いただけるよう細かな修正を加えました。
- ✏️みんなde心電図: description updatediOS· JP
- ✏️みんなde心電図: new iPad screenshotsiOS· JP
- ✏️みんなde心電図: new screenshotsiOS10 screenshots (was 10) · JP
- 📦みんなde心電図 updated to version 2.3.4iOSより快適にご利用いただけるよう細かな修正を加えました。
- 📦みんなde心電図: now updating weeklyAndroid4 updates in 30 days, after a quiet two months
- 📦みんなde心電図 updated to version 2.3.4Androidより快適にご利用いただけるよう細かな修正を加えました。
- ✏️みんなde心電図: description updatedAndroid· US
- ✏️みんなde心電図: short description updatedAndroid· US
- ✏️みんなde心電図: new screenshotsAndroid12 screenshots (was 12) · US
- ✏️みんなde心電図: new iPad screenshotsiOS· JP
- ✏️みんなde心電図: new screenshotsiOS10 screenshots (was 10) · JP
- 📦みんなde心電図 updated to version 2.3.3iOSより快適にご利用いただけるよう細かな修正を加えました。
- 📦みんなde心電図 updated to version 2.3.3Androidより快適にご利用いただけるよう細かな修正を加えました。
- 📈みんなde心電図 entered the top 100iOSTop Grossing · Medical · JP
- ✏️みんなde心電図: app got biggeriOS95 MB → 144 MB (+52%)
- ✏️みんなde心電図: needs a newer iOSiOSiOS 13.0 → iOS 15.0
- ✏️みんなde心電図: description updatediOS· JP
- 📦みんなde心電図 updated to version 2.3.2iOSより快適にご利用いただけるよう細かな修正を加えました。
- 📦みんなde心電図: first update in 109 daysiOS
- 🆕みんなde心電図 first spotted by AppInsideriOS#71 in Top Free · Medical · Japan
- 📦みんなde心電図 updated to version 2.3.2Androidより快適にご利用いただけるよう細かな修正を加えました。
- 🆕みんなde心電図 first spotted by AppInsiderAndroidJapan
- 📦みんなde心電図 version 2.3.1iOSProblem submission function implemented!
Everyone's ECG is being reborn as an ECG learning app that is even more "created by everyone."
Further improvements have been made to other aspects, such as the addition of credit attribution and some design elements.… more - 📦みんなde心電図 version 2.3.1Androidより快適にご利用いただけるよう細かな修正を加えました。
- 🆕みんなde心電図: its developer released another app: 不整脈アカデミアiOS
- 🆕みんなde心電図 released on Google PlayAndroid
- 🆕みんなde心電図 released on the App StoreiOS
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.9 ★
3.8k ratings, both stores
Measured
Best rank now
#4
Android · 
Medical Grossing
Medical GrossingMeasured
New ratings a week
30
▲ +16% vs the 2 weeks before
Measured
みんなde心電図 at a glance
AI summary written from our chart and store data, 2026-11-08. It can be wrong: check the numbers above.
A free, gamified ECG interpretation training app for healthcare professionals and students, featuring over 1,600 practice questions, certification exam preparation, and competitive ranking modes. The app is currently charting in the top 5 of Japan's Medical Grossing category and maintains a presence in the top 80 across diverse markets including Vietnam, Thailand, Saudi Arabia, Mexico, Turkey, Indonesia, UAE, India, and the Netherlands.
Similar apps: UpToDate, Medscape, Pocket Medicine
App Store
App details
App ID
6504893737
Publisher
Ryoma Kamei
Publisher country
Japan
On the store since
Jul 2024
2 years on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
12+
1 content note below
Languages
1
JA
Size
169 MB
Also listed in
Education
Content notesInfrequent/Mild Medical/Treatment Information
Google Play
App details
App ID
jp.oxas.ECGquiz
Publisher
亀井燎馬
Publisher country
Japan
Content rating
Everyone
みんなde心電図 downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| App Store | 500+ | 100k+ |
| Google Play | 10+ | 10k+ Measured |
| Total | 500+ Confidence | 100k+ Confidence |
How this is calculated
App Store: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Where みんなde心電図's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: In-app purchase-led
How みんなde心電図 makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | TURBO解放 隠しプラン | |
| 2 | TURBO解放 年額プラン | |
| 3 | TURBO解放 限定オファー | |
| 4 | TURBO解放 お試しプラン | |
| 5 | 協賛プラン（ゴールド） | |
| 6 | 開発サポーター掲載プラン | |
| 7 | 協賛プラン（プラチナ） | |
| 8 | 感謝御礼プラン | |
| 9 | デジタル手書き感謝状プラン | |
| 10 | 開発支援プラン |
Where it ranks now
Both stores, across every country we track.
| Store | Best rank | Charting in | US Top Free | US Top Grossing |
|---|---|---|---|---|
| App Store | #8 Medical Grossing | 1 of 30 countries | – | – |
| Google Play | #4 Medical Grossing | 10 of 23 countries | – | – |
Full chart lists: App Store · Google Play.
Review momentum
ⓘ How we measure thisNew ratings a week
30
▲ +16% vs the 2 weeks before
Recent ratings
4.9★
vs 4.9★ lifetime
Review momentum
84/100
faster than 91% of Medical apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.9 ★ | 3.8k |
| Google Play | – | – |
| Both stores | 4.9 ★ weighted by ratings | 3.8k |
What users say about みんなde心電図
From recent reviews.
About みんなde心電図
The ultimate ECG learning app!
Explore 1,600+ questions across 8 categories, with difficulty-based quizzes, ECG certification exam prep*, Japanese national exam-level questions, detailed explanations, AI skill assessment, performance tracking, and nationwide rankings.
Built for anyone who wants to practice more ECGs. Every question teaches a systematic, reproducible approach to interpretation. More questions are coming!
【About】
For medical students, nurses, clinical laboratory technologists, residents, physicians, cardiologists, and all healthcare professionals.
【Quiz Modes】
• Level Mode: Progress from basic to advanced ECGs.
• Quick Mode: Solve 5 questions from one category or all 8.
• Endless Mode: Keep practicing as long as you like.
No time limits. Learn at your own pace.
【TURBO】
Go further with advanced questions, exam preparation, analytics, and competition.
• Master Level: Challenge the toughest ECGs.
• Certification Exam Mode: Practice in the style of Japan's JHRS ECG Certification Exam.*
• Medical Licensing Exam: Japanese national exam-level ECG questions.
• Clinical Laboratory Technologist Exam: Japanese national exam-level practice.
• Performance Analytics: Track accuracy, strengths, and weaknesses by category.
• AI Skill Assessment: Estimate your ECG level from your results.
• Favorites: Save questions for later review.
• Time Attack: Train speed and accuracy.
• Nationwide Rankings: Compete across Japan.
• Creator Mode: Earn 2× EXP for contributing questions.
• More Content: Additional TURBO questions and eligible future features are planned.
【Lecture Mode】
Learn ECG fundamentals and step-by-step interpretation, from beginner to advanced. Learn, practice, review, and improve—all in one app.
【8 ECG Categories】
• Basic findings: normal ECG, axis deviation, rotation
• Conduction disorders: RBBB, LBBB
• Bradyarrhythmias: sinus bradycardia, sinus arrest, AV block
• Supraventricular arrhythmias: sinus tachycardia, PACs, AF
• Ventricular arrhythmias: PVCs, VT, VF
• Arrhythmia syndromes: WPW, long QT, Brugada
• Ischemic heart disease: acute MI patterns
• Other conditions: dextrocardia, low voltage, hyperkalemia, ARVC
【From the Developer】
I created this app to help people solve as many ECG questions as possible. Each question aims to teach not just the correct answer, but a method you can apply to future ECGs. The app keeps evolving with new questions and tools for learning, exam preparation, and skill assessment.
Ryoma Kamei
【Disclaimer】
For ECG education only; not for self-diagnosis or self-treatment. Medical knowledge changes over time. Consult qualified professionals for clinical decisions. The developer assumes no liability for decisions, actions, or losses arising from app use.
LITFL ECGs are used under CC BY-NC-SA 4.0. Original questions and explanations are copyrighted; unauthorized reproduction is prohibited.
*The ECG Certification Examination (心電図検定) is a registered trademark of the Japanese Heart Rhythm Society (JHRS). This
Explore 1,600+ questions across 8 categories, with difficulty-based quizzes, ECG certification exam prep*, Japanese national exam-level questions, detailed explanations, AI skill assessment, performance tracking, and nationwide rankings.
Built for anyone who wants to practice more ECGs. Every question teaches a systematic, reproducible approach to interpretation. More questions are coming!
【About】
For medical students, nurses, clinical laboratory technologists, residents, physicians, cardiologists, and all healthcare professionals.
【Quiz Modes】
• Level Mode: Progress from basic to advanced ECGs.
• Quick Mode: Solve 5 questions from one category or all 8.
• Endless Mode: Keep practicing as long as you like.
No time limits. Learn at your own pace.
【TURBO】
Go further with advanced questions, exam preparation, analytics, and competition.
• Master Level: Challenge the toughest ECGs.
• Certification Exam Mode: Practice in the style of Japan's JHRS ECG Certification Exam.*
• Medical Licensing Exam: Japanese national exam-level ECG questions.
• Clinical Laboratory Technologist Exam: Japanese national exam-level practice.
• Performance Analytics: Track accuracy, strengths, and weaknesses by category.
• AI Skill Assessment: Estimate your ECG level from your results.
• Favorites: Save questions for later review.
• Time Attack: Train speed and accuracy.
• Nationwide Rankings: Compete across Japan.
• Creator Mode: Earn 2× EXP for contributing questions.
• More Content: Additional TURBO questions and eligible future features are planned.
【Lecture Mode】
Learn ECG fundamentals and step-by-step interpretation, from beginner to advanced. Learn, practice, review, and improve—all in one app.
【8 ECG Categories】
• Basic findings: normal ECG, axis deviation, rotation
• Conduction disorders: RBBB, LBBB
• Bradyarrhythmias: sinus bradycardia, sinus arrest, AV block
• Supraventricular arrhythmias: sinus tachycardia, PACs, AF
• Ventricular arrhythmias: PVCs, VT, VF
• Arrhythmia syndromes: WPW, long QT, Brugada
• Ischemic heart disease: acute MI patterns
• Other conditions: dextrocardia, low voltage, hyperkalemia, ARVC
【From the Developer】
I created this app to help people solve as many ECG questions as possible. Each question aims to teach not just the correct answer, but a method you can apply to future ECGs. The app keeps evolving with new questions and tools for learning, exam preparation, and skill assessment.
Ryoma Kamei
【Disclaimer】
For ECG education only; not for self-diagnosis or self-treatment. Medical knowledge changes over time. Consult qualified professionals for clinical decisions. The developer assumes no liability for decisions, actions, or losses arising from app use.
LITFL ECGs are used under CC BY-NC-SA 4.0. Original questions and explanations are copyrighted; unauthorized reproduction is prohibited.
*The ECG Certification Examination (心電図検定) is a registered trademark of the Japanese Heart Rhythm Society (JHRS). This
みんなde心電図 App Store
みんなde心電図 gets 500+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
みんなde心電図 is #8 in Medical Grossing in Japan and charting in 1 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperRyoma Kamei
CategoryMedical
PriceFree
Released
Rating★ 4.9 (3.8k)
Version3.0.0
Age rating12+
First seen by us 8 Oct 2026
8 Oct 2026Installs (est.)100k+ worldwide
Rating
4.9 ★
3.8k ratings
Measured
Best rank now
#8
Medical GrossingMeasured
New ratings a week
30
▲ +16% vs the 2 weeks before
Measured
みんなde心電図 on the App Store
App details
App ID
6504893737
Publisher
Ryoma Kamei
Publisher country
Japan
On the store since
Jul 2024
2 years on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
12+
1 content note below
Languages
1
JA
Size
169 MB
Also listed in
Education
Content notesInfrequent/Mild Medical/Treatment Information
みんなde心電図 downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where みんなde心電図's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in みんなde心電図 before Apple and Google take their fee.
How this is calculated
Not in an overall Top Grossing chart, only in category charts: each category position is converted to the overall position it corresponds to, then priced on the same rank-to-revenue curve, inside the part of each market the charted apps leave over.
Business model: In-app purchase-led
How みんなde心電図 makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | TURBO解放 隠しプラン | |
| 2 | TURBO解放 年額プラン | |
| 3 | TURBO解放 限定オファー | |
| 4 | TURBO解放 お試しプラン | |
| 5 | 協賛プラン（ゴールド） | |
| 6 | 開発サポーター掲載プラン | |
| 7 | 協賛プラン（プラチナ） | |
| 8 | 感謝御礼プラン | |
| 9 | デジタル手書き感謝状プラン | |
| 10 | 開発支援プラン |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | MedicalGrossing | #8 |
| Japan | MedicalFree | #63 |
Apps near みんなde心電図 on the chart
Medical Grossing, around #8.
Ratings
App Store, worldwide.
Rating
4.9 ★
3.8k ratings
Measured
Ratings
3.8k
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
30
▲ +16% vs the 2 weeks before
Recent ratings
4.9★
vs 4.9★ lifetime
Review momentum
84/100
faster than 91% of Medical apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about みんなde心電図
From recent reviews.
About みんなde心電図
The ultimate ECG learning app!
Explore 1,600+ questions across 8 categories, with difficulty-based quizzes, ECG certification exam prep*, Japanese national exam-level questions, detailed explanations, AI skill assessment, performance tracking, and nationwide rankings.
Built for anyone who wants to practice more ECGs. Every question teaches a systematic, reproducible approach to interpretation. More questions are coming!
【About】
For medical students, nurses, clinical laboratory technologists, residents, physicians, cardiologists, and all healthcare professionals.
【Quiz Modes】
• Level Mode: Progress from basic to advanced ECGs.
• Quick Mode: Solve 5 questions from one category or all 8.
• Endless Mode: Keep practicing as long as you like.
No time limits. Learn at your own pace.
【TURBO】
Go further with advanced questions, exam preparation, analytics, and competition.
• Master Level: Challenge the toughest ECGs.
• Certification Exam Mode: Practice in the style of Japan's JHRS ECG Certification Exam.*
• Medical Licensing Exam: Japanese national exam-level ECG questions.
• Clinical Laboratory Technologist Exam: Japanese national exam-level practice.
• Performance Analytics: Track accuracy, strengths, and weaknesses by category.
• AI Skill Assessment: Estimate your ECG level from your results.
• Favorites: Save questions for later review.
• Time Attack: Train speed and accuracy.
• Nationwide Rankings: Compete across Japan.
• Creator Mode: Earn 2× EXP for contributing questions.
• More Content: Additional TURBO questions and eligible future features are planned.
【Lecture Mode】
Learn ECG fundamentals and step-by-step interpretation, from beginner to advanced. Learn, practice, review, and improve—all in one app.
【8 ECG Categories】
• Basic findings: normal ECG, axis deviation, rotation
• Conduction disorders: RBBB, LBBB
• Bradyarrhythmias: sinus bradycardia, sinus arrest, AV block
• Supraventricular arrhythmias: sinus tachycardia, PACs, AF
• Ventricular arrhythmias: PVCs, VT, VF
• Arrhythmia syndromes: WPW, long QT, Brugada
• Ischemic heart disease: acute MI patterns
• Other conditions: dextrocardia, low voltage, hyperkalemia, ARVC
【From the Developer】
I created this app to help people solve as many ECG questions as possible. Each question aims to teach not just the correct answer, but a method you can apply to future ECGs. The app keeps evolving with new questions and tools for learning, exam preparation, and skill assessment.
Ryoma Kamei
【Disclaimer】
For ECG education only; not for self-diagnosis or self-treatment. Medical knowledge changes over time. Consult qualified professionals for clinical decisions. The developer assumes no liability for decisions, actions, or losses arising from app use.
LITFL ECGs are used under CC BY-NC-SA 4.0. Original questions and explanations are copyrighted; unauthorized reproduction is prohibited.
*The ECG Certification Examination (心電図検定) is a registered trademark of the Japanese Heart Rhythm Society (JHRS). This
Explore 1,600+ questions across 8 categories, with difficulty-based quizzes, ECG certification exam prep*, Japanese national exam-level questions, detailed explanations, AI skill assessment, performance tracking, and nationwide rankings.
Built for anyone who wants to practice more ECGs. Every question teaches a systematic, reproducible approach to interpretation. More questions are coming!
【About】
For medical students, nurses, clinical laboratory technologists, residents, physicians, cardiologists, and all healthcare professionals.
【Quiz Modes】
• Level Mode: Progress from basic to advanced ECGs.
• Quick Mode: Solve 5 questions from one category or all 8.
• Endless Mode: Keep practicing as long as you like.
No time limits. Learn at your own pace.
【TURBO】
Go further with advanced questions, exam preparation, analytics, and competition.
• Master Level: Challenge the toughest ECGs.
• Certification Exam Mode: Practice in the style of Japan's JHRS ECG Certification Exam.*
• Medical Licensing Exam: Japanese national exam-level ECG questions.
• Clinical Laboratory Technologist Exam: Japanese national exam-level practice.
• Performance Analytics: Track accuracy, strengths, and weaknesses by category.
• AI Skill Assessment: Estimate your ECG level from your results.
• Favorites: Save questions for later review.
• Time Attack: Train speed and accuracy.
• Nationwide Rankings: Compete across Japan.
• Creator Mode: Earn 2× EXP for contributing questions.
• More Content: Additional TURBO questions and eligible future features are planned.
【Lecture Mode】
Learn ECG fundamentals and step-by-step interpretation, from beginner to advanced. Learn, practice, review, and improve—all in one app.
【8 ECG Categories】
• Basic findings: normal ECG, axis deviation, rotation
• Conduction disorders: RBBB, LBBB
• Bradyarrhythmias: sinus bradycardia, sinus arrest, AV block
• Supraventricular arrhythmias: sinus tachycardia, PACs, AF
• Ventricular arrhythmias: PVCs, VT, VF
• Arrhythmia syndromes: WPW, long QT, Brugada
• Ischemic heart disease: acute MI patterns
• Other conditions: dextrocardia, low voltage, hyperkalemia, ARVC
【From the Developer】
I created this app to help people solve as many ECG questions as possible. Each question aims to teach not just the correct answer, but a method you can apply to future ECGs. The app keeps evolving with new questions and tools for learning, exam preparation, and skill assessment.
Ryoma Kamei
【Disclaimer】
For ECG education only; not for self-diagnosis or self-treatment. Medical knowledge changes over time. Consult qualified professionals for clinical decisions. The developer assumes no liability for decisions, actions, or losses arising from app use.
LITFL ECGs are used under CC BY-NC-SA 4.0. Original questions and explanations are copyrighted; unauthorized reproduction is prohibited.
*The ECG Certification Examination (心電図検定) is a registered trademark of the Japanese Heart Rhythm Society (JHRS). This
Latest updates
3.0.0
【大型アップデート！新機能「TURBO」登場！】
心電図学習をさらに楽しく、効率的にする新機能を追加しました！
・最難関「マイスター」レベルを追加
・検定試験モードを追加
・医師・臨床検査技師国家試験レベルを追加
・個人成績表、分野別成績分析を追加
・AIによる心電図レベル判定機能を追加
・お気に入り問題の保存・復習機能を追加
・タイムアタックモードを追加
・全国ランキング機能を追加
・TURBO会員限定でクリエイターEXPが2倍に！
その他、軽微な不具合の修正と動作の改善を行いました。
今後も新しい問題や機能を順次追加予定です！
2.3.6
より快適にご利用いただけるよう細かな修正を加えました。
2.3.5
より快適にご利用いただけるよう細かな修正を加えました。
Store changes
What みんなde心電図 changed on its store page: name, icon, screenshots, price, size, languages, requirements.
App got bigger
144 MB → 169 MB (+17%)
New iPad screenshots
New screenshots
10 screenshots (was 10)
More from Ryoma Kamei
みんなde心電図 Android
みんなde心電図 gets 500+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
みんなde心電図 is #4 in Medical Grossing on Google Play in Japan and charting in 10 of 23 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperRyoma Kamei
CategoryMedical
PriceFree
Released
Installs10k+
Rating–
Updated
Content ratingEveryone
Best rank now
#4
Medical GrossingMeasured
みんなde心電図 at a glance
AI summary written from our chart and store data, 2026-11-08. It can be wrong: check the numbers above.
A free, gamified ECG interpretation training app for healthcare professionals and students, featuring over 1,600 practice questions, certification exam preparation, and competitive ranking modes. The app is currently charting in the top 5 of Japan's Medical Grossing category and maintains a presence in the top 80 across diverse markets including Vietnam, Thailand, Saudi Arabia, Mexico, Turkey, Indonesia, UAE, India, and the Netherlands.
Similar apps: UpToDate, Medscape, Pocket Medicine
みんなde心電図 on Google Play
App details
App ID
jp.oxas.ECGquiz
Publisher
亀井燎馬
Publisher country
Japan
Content rating
Everyone
みんなde心電図 downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where みんなde心電図's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in みんなde心電図 before Apple and Google take their fee.
How this is calculated
Not in an overall Top Grossing chart, only in category charts: each category position is converted to the overall position it corresponds to, then priced on the same rank-to-revenue curve, inside the part of each market the charted apps leave over.
Business model: In-app purchase-led
How みんなde心電図 makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | TURBO解放 隠しプラン | |
| 2 | TURBO解放 年額プラン | |
| 3 | TURBO解放 限定オファー | |
| 4 | TURBO解放 お試しプラン | |
| 5 | 協賛プラン（ゴールド） | |
| 6 | 開発サポーター掲載プラン | |
| 7 | 協賛プラン（プラチナ） | |
| 8 | 感謝御礼プラン | |
| 9 | デジタル手書き感謝状プラン | |
| 10 | 開発支援プラン |
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | MedicalGrossing | #4 |
| Japan | MedicalFree | #71 |
 India | MedicalGrossing | #73 |
 Mexico | MedicalGrossing | #78 |
 Saudi Arabia | MedicalGrossing | #73 |
 Indonesia | MedicalGrossing | #75 |
 Turkey | MedicalGrossing | #70 |
 United Arab Emirates | MedicalGrossing | #74 |
 Netherlands | MedicalGrossing | #80 |
 Thailand | MedicalGrossing | #70 |
 Vietnam | MedicalGrossing | #72 |
Apps near みんなde心電図 on the chart
Medical Grossing, around #4.
What users say about みんなde心電図
From recent reviews.
About みんなde心電図
The ultimate ECG learning app!
Includes over 1600 questions across 8 fields. Furthermore, it offers a complete learning environment where you can "solve, learn, assess your skills, and compete" in ECGs, with features such as level-based practice, ECG certification exam preparation*, national exam level questions, performance analysis, national rankings, and time attack modes.
This app was created to meet the demand for "solving tons of ECG problems!" It includes over 1600 questions conforming to the ECG certification exam format, with more questions planned for future updates. All questions include explanations, emphasizing not just memorizing answers, but enabling you to reproducibly read ECGs using the same interpretation procedures. *
【About this app】
This app is intended for all healthcare professionals learning ECGs, including medical students, nurses, clinical laboratory technicians, residents, general practitioners, cardiologists, family physicians, and private practitioners.
It includes numerous questions conforming to the ECG certification exam format, making it useful for exam preparation. *
[Quiz Mode]
Level-Based Mode: Challenge yourself step-by-step according to your skill level.
Quick Mode: Quickly practice with just 5 questions. Choose from any of the 8 fields, or all of them.
Endless Mode: Questions continue until you finish. You can focus on solving questions in your favorite field, or challenge yourself randomly from all fields.
All questions come with detailed explanations. There is no time limit, allowing you to learn at your own pace.
[TURBO Implemented!]
Want to challenge yourself with more difficult electrocardiograms? Want to deepen your exam preparation? Want to know your skill level numerically? Want to compete with users nationwide?
This is an upgrade function for people like you.
・Master Level
Challenge yourself with the highest level questions beyond the normal level. Test your advanced image interpretation skills that cannot be solved with knowledge alone.
・Certification Mode
Focus on practice questions geared towards the electrocardiogram certification exam. You can repeatedly challenge yourself in a practical format, from regular learning to exam preparation. *
* Medical Examination Level: Challenge yourself with ECG-related problems designed to meet the level required for the Medical Examination.
* Clinical Laboratory Technologist Examination Level: Includes problems designed to prepare you for the Clinical Laboratory Technologist Examination. Use this to assess your abilities for exam preparation.
* Personal Performance Report / Subject-Specific Performance: Review your past performance and correct answer rates for each subject. Visualize your strengths and weaknesses to understand what you need to study next.
* AI ECG Level Assessment: Based on your learning performance, AI assesses your current ECG level. Track your progress as you continue learning.
* Favorite Problems: Save incorrect answers,
Includes over 1600 questions across 8 fields. Furthermore, it offers a complete learning environment where you can "solve, learn, assess your skills, and compete" in ECGs, with features such as level-based practice, ECG certification exam preparation*, national exam level questions, performance analysis, national rankings, and time attack modes.
This app was created to meet the demand for "solving tons of ECG problems!" It includes over 1600 questions conforming to the ECG certification exam format, with more questions planned for future updates. All questions include explanations, emphasizing not just memorizing answers, but enabling you to reproducibly read ECGs using the same interpretation procedures. *
【About this app】
This app is intended for all healthcare professionals learning ECGs, including medical students, nurses, clinical laboratory technicians, residents, general practitioners, cardiologists, family physicians, and private practitioners.
It includes numerous questions conforming to the ECG certification exam format, making it useful for exam preparation. *
[Quiz Mode]
Level-Based Mode: Challenge yourself step-by-step according to your skill level.
Quick Mode: Quickly practice with just 5 questions. Choose from any of the 8 fields, or all of them.
Endless Mode: Questions continue until you finish. You can focus on solving questions in your favorite field, or challenge yourself randomly from all fields.
All questions come with detailed explanations. There is no time limit, allowing you to learn at your own pace.
[TURBO Implemented!]
Want to challenge yourself with more difficult electrocardiograms? Want to deepen your exam preparation? Want to know your skill level numerically? Want to compete with users nationwide?
This is an upgrade function for people like you.
・Master Level
Challenge yourself with the highest level questions beyond the normal level. Test your advanced image interpretation skills that cannot be solved with knowledge alone.
・Certification Mode
Focus on practice questions geared towards the electrocardiogram certification exam. You can repeatedly challenge yourself in a practical format, from regular learning to exam preparation. *
* Medical Examination Level: Challenge yourself with ECG-related problems designed to meet the level required for the Medical Examination.
* Clinical Laboratory Technologist Examination Level: Includes problems designed to prepare you for the Clinical Laboratory Technologist Examination. Use this to assess your abilities for exam preparation.
* Personal Performance Report / Subject-Specific Performance: Review your past performance and correct answer rates for each subject. Visualize your strengths and weaknesses to understand what you need to study next.
* AI ECG Level Assessment: Based on your learning performance, AI assesses your current ECG level. Track your progress as you continue learning.
* Favorite Problems: Save incorrect answers,
What's new in 3.0.0
【大型アップデート！新機能「TURBO」登場！】
心電図学習をさらに楽しく、効率的にする新機能を追加しました！
・最難関「マイスター」レベルを追加
・検定試験モードを追加
・医師・臨床検査技師国家試験レベルを追加
・個人成績表、分野別成績分析を追加
・AIによる心電図レベル判定機能を追加
・お気に入り問題の保存・復習機能を追加
・タイムアタックモードを追加
・全国ランキング機能を追加
・TURBO会員限定でクリエイターEXPが2倍に！
その他、軽微な不具合の修正と動作の改善を行いました。
今後も新しい問題や機能を順次追加予定です！
心電図学習をさらに楽しく、効率的にする新機能を追加しました！
・最難関「マイスター」レベルを追加
・検定試験モードを追加
・医師・臨床検査技師国家試験レベルを追加
・個人成績表、分野別成績分析を追加
・AIによる心電図レベル判定機能を追加
・お気に入り問題の保存・復習機能を追加
・タイムアタックモードを追加
・全国ランキング機能を追加
・TURBO会員限定でクリエイターEXPが2倍に！
その他、軽微な不具合の修正と動作の改善を行いました。
今後も新しい問題や機能を順次追加予定です！
Store changes
What みんなde心電図 changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Description updated
Short description updated
New screenshots
12 screenshots (was 12)