Comparison

Trans4motor vs 司書試験対策

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Trans4motor

Explore the mechanics of 4-stroke engines with this interactive simulator. Visualize the transformation of various engine types and understand their internal workings through detailed CG animation. Enhance your knowledge with adjustable settings and realistic engine sound options.

Highlights
  • Multi-cylinder engine transformation
  • Realistic engine sound (in-app purchase)
  • Accelerator control simulation
  • Expandable engine library
  • Custom engine registration and editing
  • Interactive educational videos
Read full description

Trans4motor is a simulator where you can control the movements of single cylinder to 12 cylinder 4 stroke engines on the iPad/iPhone. Recommended to anyone interested in car and motorcycle engines. This is for those who have a relentless love for engines and want to enhance their knowledge. #3 Top Paid iPad App in Japan #5 Top Paid iPhone App in Japan https://www.youtube.com/user/Trans4motor https://www.facebook.com/Trans4motor Features 1) Seamlessly transforms into different type of engines Select from inline to V-type, or other multi-cylinder engines, and watch the running engines transform over continuous CG animation. Enjoy watching the inline engine camshaft separate into two parts as it transforms into the V-type engine and how phase angle modulation between cylinders makes the crankshaft rotate, separate, and combine into many engine formations. 2) Add Engine Sound (In-App Purchase) Developed in technical collaboration with "CAI MEDIA CO.,LTD.", the developer of the iPhone app featuring innovative synthetic engine sound, "RealEngineSim" this new feature will add a variety of realistic engine sounds ranging from different number of cylinders to explosions with unequal intervals and cylinder rest. Engine Sound Add-On is available via In-App Purchase. 3) Accelerator Control Accelerator control is available during engine sound replay. Tilt iPhone to different degrees as if pressing the accelerator pedal. Tilt forward horizontally (as if pressing the accelerator) to activate the accelerator, and erect vertically (as if releasing the accelerator) to deactivate it. Furthermore, you can race the engine by tapping the center of rev counter. 4) Addition/expansion of engines There are currently 22 types of engines registered. Through automatic network updates, continuous expansion is planned. In addition, there are functions installed that allow users to newly register and edit engines. Able to adjust setting for engine bore stroke, firing order, and ignition timing. Easily replicate on the iPad, engines with unequal combustion intervals for two-wheelers, Inline-four crossplane or V5. 5) Interactive Movie ·Four-stroke engines ·Firing Order ·V Angle Recorded 3 controllable presentation videos. The company and product names used within the application are generally registered trademarks or trademarks of the respective companies. The objective of this application is to upload engine specifications disclosed to the public and to learn about general information regarding engines. It does not accurately replicate actual machine measurements and designs. The CG animated engine rotates at one tenth of the actual speed to enable users to learn the structure and to enjoy the visual.

About

司書試験対策

Features
Read full description

司書試験対策の対策クイズアプリです。 試験範囲を網羅した良質な問題を収録。 章別学習や模擬試験機能で効率的に学べます。 ・全問四肢択一形式 ・詳しい解答と解説付き ・章別の学習進捗トラッキング ・模擬試験で実戦演習 受験対策にお役立てください。 ※本アプリは試験対策に作成された予想問題集です。

Screenshots

Trans4motor4 screens
司書試験対策4 screens

Verdict

The call

The clearest difference is in-app purchases: 司書試験対策 at none against Trans4motor's 1. 司書試験対策 also leads on update cadence (monthly vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

UpkeepUpdate frequency

Trans4motor ships an update every 2 months, 司書試験対策 monthly. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.

Scorecard2 real differences · 8 level
Trans4motor versus 司書試験対策: the parameters behind the verdict, then further details
ParameterTrans4motor司書試験対策
Price$2.99 — better—
Rating3.7 (70 ratings) — better—
Positive reviews56.6% of reviews—
Number of ratings70 — better—
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size24 MB34 MB
Age rating4+4+
DeveloperKitt Peak, Inc.satoshi yoshida

In-app purchases

1 purchases

Trans4motor

One-time1
  • Add Engine Sound$1.99
None

司書試験対策

No in-app purchases

Questions

Is Trans4motor free?
Trans4motor costs $2.99, and also offers in-app purchases.
Is 司書試験対策 free?
Pricing for 司書試験対策 is not currently listed on the App Store.
Do Trans4motor or 司書試験対策 have ads?
Neither Trans4motor nor 司書試験対策 shows ads.
Which is updated more often, Trans4motor or 司書試験対策?
Trans4motor ships an update every 2 months, and 司書試験対策 monthly. Most recently, Trans4motor was updated on September 21, 2026 and 司書試験対策 on September 8, 2026.

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