Train Clock vs 回転してるのな〜んだ？
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Train Clock
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This is an app that helps you learn how to read a clock. The minute hand is a Shinkansen, the hour hand is a conventional train, and the second hand is a steam locomotive. The trains are displayed randomly. When you tap the Shinkansen icon at the bottom of the screen, the Shinkansen used as the minute hand changes to another Shinkansen. When you tap the conventional train icon, the train used as the hour hand transforms into another train. At the top of the screen, trains stop at a station at random. Every two minutes, a train departs.
回転してるのな〜んだ？
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回転しているのはな〜んだ？ よ〜く目を凝らして当ててみよう！ 新感覚クイズアプリ！ ジャンルや問題数も豊富で楽しめます。 今後のアップデートもようご期待！
Screenshots
Verdict
The clearest difference is ads: Train Clock at none against 回転してるのな〜んだ？'s shown. Train Clock also leads on iOS requirement (13.0 vs 15.2). 回転してるのな〜んだ？'s advantage is update cadence (weekly vs every 23 months). On price, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Train Clock ships an update every 23 months, 回転してるのな〜んだ？ weekly. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.
| Parameter | Train Clock | 回転してるのな〜んだ？ |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 23 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.2 |
| Further details — not scored | ||
| Size | 143 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | hiroyuki uchida | Toshiyuki Susa |
In-app purchases
Train Clock
No in-app purchases
回転してるのな〜んだ？
No in-app purchases
