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 is #103 in Education Free on Google Play in Japan and charting in 1 of 15 countries we track.
Updated 27 Sep 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
#103
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
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.
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 15 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | EducationFree | #103 |
Apps near 危険物乙４ 全問解説 - 独学TODAY on the chart
Education Free, around #103.
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!