Ko4Study Downloads & RevenueKo4Study - Fire Exam Japan · App Store
消防設備士 甲種４類 試験対策
Ko4Study - Fire Exam Japan is #113 in Education Paid in Japan and charting in 1 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperTANI YUICHIRO
CategoryEducation
Price600 JPY
Released
Rating★ 0.0 (0)
Version2.1.0
Age rating4+
First seen by us
6 Oct 2026
6 Oct 2026Ko4Study - Fire Exam Japan update history & changes
Last change · 7 events since 23 Jun 2026Full timeline ↓✏️New iPad screenshots✏️New screenshots📦Updated to version 2.1.0📈New best rank in the overall chart: #123🆕First spotted by AppInsider📦Version 2.0.0🆕Released on the App Store
Full timeline · 7 events
- ✏️Ko4Study - Fire Exam Japan: new iPad screenshots· JP
- ✏️Ko4Study - Fire Exam Japan: new screenshots10 screenshots (was 10) · JP
- 📦Ko4Study - Fire Exam Japan updated to version 2.1.0What's New in Version 2.1.0
■ 50 New Mnemonics
Learn important regulations, installation requirements, numerical standards, and formulas with easy-to-remember mnemonics.
■ 100 New Practice Questions
Test what you've learned with 100 practice questions linked to the mnemonics, including optional hints and detailed explanations.
■ Improved Developer Feedback
Easily report errors or suggest improvements directly from the question screen. You can copy a prepared report or open your email app to send feedback.
■ Improved Learning Data Protection
Enhanced error notifications and safeguards for saved learning progress to provide a more reliable study experience.
■ Additional Improvements
Refined the user interface and usability for a smoother learning experience.
We will continue improving the app to support your Fire Protection Equipment Engineer exam preparation.… more - 📈Ko4Study - Fire Exam Japan new best rank in the overall chart: #123Top Paid · All Apps · JP
- 🆕Ko4Study - Fire Exam Japan first spotted by AppInsider#1 in Top Paid · Education · Japan
- 📦Ko4Study - Fire Exam Japan version 2.0.0Expanded wiring practice to 65 exercises and added a step-by-step solving mode.
Added 9 new construction and drawing exercises, including more detailed practice on feed wiring and end-of-line resistor routing.
Also added an unanswered-only study option, refreshed wiring diagrams for a more consistent layout, moved detailed conditions into collapsible notes, and revised explanations and diagrams for clarity.… more - 🆕Ko4Study - Fire Exam Japan released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
0.0 ★
0 ratings
Measured
Best rank now
#113
Education PaidMeasured
Ko4Study - Fire Exam Japan on the App Store
App details
App ID
6782828817
Publisher
TANI YUICHIRO
On the store since
Jun 2026
Under a year
Minimum OS
iOS 15.1+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
2
EN JA
Size
21 MB
Also listed in
Books
Where Ko4Study - Fire Exam Japan's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | EducationPaid | #113 |
Apps near Ko4Study - Fire Exam Japan on the chart
Education Paid, around #113.
Ratings
App Store, worldwide.
Rating
0.0 ★
0 ratings
Measured
Ratings
0
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
5.0★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
48/100
faster than 47% of Education 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.
About Ko4Study - Fire Exam Japan
This app is a comprehensive study tool for the Japanese Fire Equipment Inspector Class A Type 4 exam. It includes 390+ multiple choice questions, 200 flashcards, wiring calculation exercises, system diagram practice, mock exams, and a photo gallery of real fire detection equipment. All content works offline. Track your progress and study efficiently for the national exam.
Latest updates
2.1.0
What's New in Version 2.1.0
■ 50 New Mnemonics
Learn important regulations, installation requirements, numerical standards, and formulas with easy-to-remember mnemonics.
■ 100 New Practice Questions
Test what you've learned with 100 practice questions linked to the mnemonics, including optional hints and detailed explanations.
■ Improved Developer Feedback
Easily report errors or suggest improvements directly from the question screen. You can copy a prepared report or open your email app to send feedback.
■ Improved Learning Data Protection
Enhanced error notifications and safeguards for saved learning progress to provide a more reliable study experience.
■ Additional Improvements
Refined the user interface and usability for a smoother learning experience.
We will continue improving the app to support your Fire Protection Equipment Engineer exam preparation.
2.0.0
Expanded wiring practice to 65 exercises and added a step-by-step solving mode.
Added 9 new construction and drawing exercises, including more detailed practice on feed wiring and end-of-line resistor routing.
Also added an unanswered-only study option, refreshed wiring diagrams for a more consistent layout, moved detailed conditions into collapsible notes, and revised explanations and diagrams for clarity.
Store changes
What Ko4Study - Fire Exam Japan changed on its store page: name, icon, screenshots, price, size, languages, requirements.
New iPad screenshots
New screenshots
10 screenshots (was 10)