みんなde心電図: iPhone vs Android
みんなde心電図 gets 100+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
みんなde心電図 by Ryoma Kamei is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
4.9 ★
3.7k ratings, both stores
Measured
Best rank now
#23
iPhone · 
Medical Grossing
Medical GrossingMeasured
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
146 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 |
|---|---|---|
| iPhone | 100+ | 100k+ |
| Google Play | 10+ | 10k+ Measured |
| Total | 100+ Confidence | 100k+ Confidence |
How this is calculated
iPhone: 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.
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
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.9 ★ | 3.7k |
| Google Play | 4.8 ★ | – |
| Both stores | 4.9 ★ weighted by ratings | 3.7k |
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 iPhone
みんなde心電図 gets 100+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
みんなde心電図 is #23 in Medical Grossing in Japan and charting in 1 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperRyoma Kamei
CategoryMedical
PriceFree
Released
Rating★ 4.9 (3.7k)
Version2.3.4
Age rating12+
First seen by us 8 Oct 2026
8 Oct 2026Installs (est.)100k+ worldwide
Rating
4.9 ★
3.7k ratings
Measured
Best rank now
#23
Medical GrossingMeasured
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
146 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. iPhone 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.
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
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | MedicalGrossing | #23 |
| Japan | MedicalFree | #59 |
Apps near みんなde心電図 on the chart
Medical Grossing, around #23.
Ratings
App Store, worldwide.
Rating
4.9 ★
3.7k ratings
Measured
Ratings
3.7k
Measured
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
2.3.4
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。
2.3.3
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。
2.3.2
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.
Description updated
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 100+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
みんなde心電図 is #90 in Medical Free on Google Play in Japan and charting in 1 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperRyoma Kamei
CategoryMedical
PriceFree
Released
Installs10k+
Rating★ 4.8 (0)
Updated
Content ratingEveryone
Rating
4.8 ★
0 ratings
Measured
Best rank now
#90
Medical FreeMeasured
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.
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
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | MedicalFree | #90 |
Apps near みんなde心電図 on the chart
Medical Free, around #90.
Ratings
Google Play, worldwide.
Rating
4.8 ★
0 ratings
Measured
Ratings
0
Measured
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 2.3.4
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.
Description updated
Short description updated
New screenshots
12 screenshots (was 12)