危険物乙４ 全問解説 - 独学TODAY: iPhone vs Android
危険物乙４ 全問解説 - 独学TODAY gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
危険物乙４ 全問解説 - 独学TODAY by Trips LLC 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
4.6 ★
6.4k ratings, both stores
Measured
Best rank now
#67
Android · 
Education Free
Education FreeMeasured
App Store
App details
App ID
1581542208
Publisher
Trips LLC
Publisher country
Japan
On the store since
Aug 2021
5 years on the store
Minimum OS
iOS 17.0+
iPhone XS and later
Devices
iPhone · iPad
Universal purchase
Content rating
12+
9 content notes below
Languages
1
JA
Size
51 MB
Also listed in
Word, Games, Trivia
Content notesInfrequent/Mild Mature/Suggestive ThemesInfrequent/Mild Simulated GamblingInfrequent/Mild Medical/Treatment InformationInfrequent/Mild Profanity or Crude HumorInfrequent/Mild Realistic ViolenceInfrequent/Mild Alcohol, Tobacco, or Drug Use or ReferencesInfrequent/Mild Horror/Fear ThemesInfrequent/Mild Sexual Content and NudityInfrequent/Mild Cartoon or Fantasy Violence
Google Play
App details
App ID
jp.co.trips.shikakukikenbutsuotsu4
Publisher
TRIPS LLC
Publisher country
Japan
Content rating
Everyone 10+
危険物乙４ 全問解説 - 独学TODAY downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | 500+ | – |
| Google Play | 50+ | 100k+ Measured |
| Total | 500+ 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 危険物乙４ 全問解説 - 独学TODAY'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: Ad-led
How 危険物乙４ 全問解説 - 独学TODAY makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 4 ad networks
One-off purchases
/mo
of revenue
Ads
/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 | 4.6 ★ | 6.4k |
| Google Play | 4.5 ★ | – |
| Both stores | 4.6 ★ weighted by ratings | 6.4k |
About 危険物乙４ 全問解説 - 独学TODAY
危険物取扱者乙種第4類、乙4（おつよん）対策アプリの決定版！基本の一問一答から本番形式まで、よく出る618問題。
全問題に丁寧な解説付き。チェックを入れた問題を後からまとめて復習できる機能もあります。
危険物乙四の勉強方法を詳しく解説した「危険物乙４の学習法」ページも必見！
本アプリ「危険物乙４ 全問解説 - 独学TODAY」は、無料ですべてのコンテンツをご利用頂けます。
広告表示が気になる方は、有料となり誠に恐縮ですが、もし宜しければ「本気で学習プラン（広告非表示）」をご利用ください。
利用規約 https://apps.trips.co.jp/terms_of_use.html
不具合などに気が付かれた方は、アプリ内のお問い合わせからお気軽にご連絡下さい。
本アプリ「危険物乙４ 全問解説 - 独学TODAY - 基本の一問一答から本番形式までよく出る618問」は、
累計1000万DL、信頼と実績の資格試験対策アプリ「独学TODAY」シリーズのアプリです。
資格取得・試験勉強の強い味方。国家資格「乙種第4類危険物取扱者」を取るなら、この人気の無料アプリを今すぐインストール！
全問題に丁寧な解説付き。チェックを入れた問題を後からまとめて復習できる機能もあります。
危険物乙四の勉強方法を詳しく解説した「危険物乙４の学習法」ページも必見！
本アプリ「危険物乙４ 全問解説 - 独学TODAY」は、無料ですべてのコンテンツをご利用頂けます。
広告表示が気になる方は、有料となり誠に恐縮ですが、もし宜しければ「本気で学習プラン（広告非表示）」をご利用ください。
利用規約 https://apps.trips.co.jp/terms_of_use.html
不具合などに気が付かれた方は、アプリ内のお問い合わせからお気軽にご連絡下さい。
本アプリ「危険物乙４ 全問解説 - 独学TODAY - 基本の一問一答から本番形式までよく出る618問」は、
累計1000万DL、信頼と実績の資格試験対策アプリ「独学TODAY」シリーズのアプリです。
資格取得・試験勉強の強い味方。国家資格「乙種第4類危険物取扱者」を取るなら、この人気の無料アプリを今すぐインストール！
危険物乙４ 全問解説 - 独学TODAY iPhone
危険物乙４ 全問解説 - 独学TODAY gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
危険物乙４ 全問解説 - 独学TODAY is #195 in Education Free in Japan and charting in 1 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperTrips LLC
CategoryEducation
PriceFree
Released
Rating★ 4.6 (6.4k)
Version9.43.0
Age rating12+
First seen by us 8 Oct 2026
8 Oct 2026Rating
4.6 ★
6.4k ratings
Measured
Best rank now
#195
Education FreeMeasured
危険物乙４ 全問解説 - 独学TODAY on the App Store
App details
App ID
1581542208
Publisher
Trips LLC
Publisher country
Japan
On the store since
Aug 2021
5 years on the store
Minimum OS
iOS 17.0+
iPhone XS and later
Devices
iPhone · iPad
Universal purchase
Content rating
12+
9 content notes below
Languages
1
JA
Size
51 MB
Also listed in
Word, Games, Trivia
Content notesInfrequent/Mild Mature/Suggestive ThemesInfrequent/Mild Simulated GamblingInfrequent/Mild Medical/Treatment InformationInfrequent/Mild Profanity or Crude HumorInfrequent/Mild Realistic ViolenceInfrequent/Mild Alcohol, Tobacco, or Drug Use or ReferencesInfrequent/Mild Horror/Fear ThemesInfrequent/Mild Sexual Content and NudityInfrequent/Mild Cartoon or Fantasy Violence
危険物乙４ 全問解説 - 独学TODAY 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 危険物乙４ 全問解説 - 独学TODAY'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: Ad-led
How 危険物乙４ 全問解説 - 独学TODAY makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 4 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | EducationFree | #195 |
Apps near 危険物乙４ 全問解説 - 独学TODAY on the chart
Education Free, around #195.
Ratings
App Store, worldwide.
Rating
4.6 ★
6.4k ratings
Measured
Ratings
6.4k
Measured
About 危険物乙４ 全問解説 - 独学TODAY
危険物取扱者乙種第4類、乙4（おつよん）対策アプリの決定版！基本の一問一答から本番形式まで、よく出る618問題。
全問題に丁寧な解説付き。チェックを入れた問題を後からまとめて復習できる機能もあります。
危険物乙四の勉強方法を詳しく解説した「危険物乙４の学習法」ページも必見！
本アプリ「危険物乙４ 全問解説 - 独学TODAY」は、無料ですべてのコンテンツをご利用頂けます。
広告表示が気になる方は、有料となり誠に恐縮ですが、もし宜しければ「本気で学習プラン（広告非表示）」をご利用ください。
利用規約 https://apps.trips.co.jp/terms_of_use.html
不具合などに気が付かれた方は、アプリ内のお問い合わせからお気軽にご連絡下さい。
本アプリ「危険物乙４ 全問解説 - 独学TODAY - 基本の一問一答から本番形式までよく出る618問」は、
累計1000万DL、信頼と実績の資格試験対策アプリ「独学TODAY」シリーズのアプリです。
資格取得・試験勉強の強い味方。国家資格「乙種第4類危険物取扱者」を取るなら、この人気の無料アプリを今すぐインストール！
全問題に丁寧な解説付き。チェックを入れた問題を後からまとめて復習できる機能もあります。
危険物乙四の勉強方法を詳しく解説した「危険物乙４の学習法」ページも必見！
本アプリ「危険物乙４ 全問解説 - 独学TODAY」は、無料ですべてのコンテンツをご利用頂けます。
広告表示が気になる方は、有料となり誠に恐縮ですが、もし宜しければ「本気で学習プラン（広告非表示）」をご利用ください。
利用規約 https://apps.trips.co.jp/terms_of_use.html
不具合などに気が付かれた方は、アプリ内のお問い合わせからお気軽にご連絡下さい。
本アプリ「危険物乙４ 全問解説 - 独学TODAY - 基本の一問一答から本番形式までよく出る618問」は、
累計1000万DL、信頼と実績の資格試験対策アプリ「独学TODAY」シリーズのアプリです。
資格取得・試験勉強の強い味方。国家資格「乙種第4類危険物取扱者」を取るなら、この人気の無料アプリを今すぐインストール！
Latest updates
9.43.0
たくさんの応援レビューありがとうございます！とても嬉しいです！
・各問題セットのアイコン表示が円グラフになり、一見して進捗が把握できるようになりました！
・いくつかの問題内容を加筆修正しました
- 基礎的な物理・化学①＞引火と発火 その1＞第2問＞解説文
- 基礎的な物理・化学①＞消火と消火剤 その2＞第5問＞選択肢・解説文
- 基礎的な物理・化学②＞ボイル・シャルルの法則＞第1問＞解説文
- 危険物の性質・火災予防・消火＞
- 第4類危険物の消火方法 その1＞第3問＞解説文
- 第4石油類＞第1問＞問題文・解説文
- 特殊引火物の品目ごとの性状＞第5問＞解説文
- 【本番演習】（五問択一形式）＞危険物に関する法令 その7＞第5問＞問題文
これからも人気の本アプリ「危険物乙４ 全問解説 - 独学TODAY」を宜しくお願いします！
More from Trips LLC
危険物乙４ 全問解説 - 独学TODAY Android
危険物乙４ 全問解説 - 独学TODAY gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
危険物乙４ 全問解説 - 独学TODAY is #67 in Education Free on Google Play in Japan and charting in 1 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperTRIPS LLC
CategoryEducation
PriceFree
Released
Installs100k+
Rating★ 4.5 (0)
Updated–
Content ratingEveryone 10+
Rating
4.5 ★
0 ratings
Measured
Best rank now
#67
Education FreeMeasured
危険物乙４ 全問解説 - 独学TODAY on Google Play
App details
App ID
jp.co.trips.shikakukikenbutsuotsu4
Publisher
TRIPS LLC
Publisher country
Japan
Content rating
Everyone 10+
危険物乙４ 全問解説 - 独学TODAY 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 危険物乙４ 全問解説 - 独学TODAY'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: Ad-led
How 危険物乙４ 全問解説 - 独学TODAY makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 4 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | EducationFree | #67 |
Apps near 危険物乙４ 全問解説 - 独学TODAY on the chart
Education Free, around #67.
Ratings
Google Play, worldwide.
Rating
4.5 ★
0 ratings
Measured
Ratings
0
Measured
About 危険物乙４ 全問解説 - 独学TODAY
The definitive app for studying for the Class B Hazardous Materials Handler License, Category 4 (Otsu-yon)! From basic Q&A to exam-style questions, it features 618 frequently asked questions.
All questions include detailed explanations. There's also a function to review checked questions later.
Don't miss the "Hazardous Materials Class B-4 Study Method" page, which provides detailed explanations on how to study for the Hazardous Materials Class B-4 exam!
This app, "Hazardous Materials Class B-4 Complete Question Explanation - Self-Study TODAY," is free to use.
If you are concerned about advertisements, we apologize, but please consider the paid "Serious Study Plan (Ad-Free)."
Terms of Use: https://apps.trips.co.jp/terms_of_use.html
If you notice any bugs or issues, please feel free to contact us through the in-app inquiry form.
This app, "Hazardous Materials Class B, Category 4: Complete Question Explanation - Self-Study TODAY - 618 Frequently Asked Questions from Basic Q&A to Exam Format," is part of the "Self-Study TODAY" series, a trusted and proven qualification exam preparation app with over 10 million downloads.
A powerful ally for qualification acquisition and exam preparation. If you want to obtain the national qualification "Class B, Category 4 Hazardous Materials Handler," install this popular free app now!
All questions include detailed explanations. There's also a function to review checked questions later.
Don't miss the "Hazardous Materials Class B-4 Study Method" page, which provides detailed explanations on how to study for the Hazardous Materials Class B-4 exam!
This app, "Hazardous Materials Class B-4 Complete Question Explanation - Self-Study TODAY," is free to use.
If you are concerned about advertisements, we apologize, but please consider the paid "Serious Study Plan (Ad-Free)."
Terms of Use: https://apps.trips.co.jp/terms_of_use.html
If you notice any bugs or issues, please feel free to contact us through the in-app inquiry form.
This app, "Hazardous Materials Class B, Category 4: Complete Question Explanation - Self-Study TODAY - 618 Frequently Asked Questions from Basic Q&A to Exam Format," is part of the "Self-Study TODAY" series, a trusted and proven qualification exam preparation app with over 10 million downloads.
A powerful ally for qualification acquisition and exam preparation. If you want to obtain the national qualification "Class B, Category 4 Hazardous Materials Handler," install this popular free app now!