Comparison

チャレンジ!ストップウォッチ vs Inner Clock Master

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

Head to head
About

チャレンジ!ストップウォッチ

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「チャレンジ!ストップウォッチ」は、発達障がい(自閉症、アスペルガー症候群、注意欠如・多動性障がい(ADHD)、 学習障がい、チック障がい)のある児童向け療育・知育ゲームアプリです。 障がいのある子ども向けのシンプルなゲームアプリとなっています。 ◆ ルールは超簡単 ◆ ストップウォッチの針を見ないで指定された秒数で止め、時間感覚を トレーニングする感覚ゲーム! ストップウォッチの目標タイムは「5秒・10秒・15秒・20秒」から選べます。 ストップウォッチを目標タイムぴったりで止めて時間間隔を身に着けよう! 目指せ!最高記録! * オフラインでも遊ぶことができるので旅行中でもWi-Fiがなくても遊べます。 * 本ゲームは無料ですが広告が表示されます。 * 遊び時間にご注意ください。

About

Inner Clock Master

Features
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"Inner Clock Master" is a simple yet addictive timing game that tests your sense of time. Measure the displayed target seconds using only your internal clock, without watching the timer. ◆ Simple & Intuitive Controls Tap to start Tap again when you think the target time has passed Results displayed instantly ◆ Precise Judgment System Measures error down to 0.01 seconds Perfect judgment within 0.01s error Tiered scoring system ◆ Deep Gameplay Chain successes to stack multipliers Track your best score and aim to beat it Review round history to see your progress ◆ Engaging Mechanics LIMIT System: Large errors deal damage Game over when LIMIT reaches zero Continue by watching ads ◆ Beautiful Design Elegant gradient background Clear score display Smooth animations Perfect For ・Looking for a great time-killer game ・Love simple but deep games ・Want to test your time perception ・Training concentration skills ・Enjoy chasing high scores Scoring System Base points determined by error: 0.00s: 100 points (Perfect!) Within 0.05s: 80 points Within 0.10s: 60 points Within 0.30s: 40 points Multipliers increase with consecutive successes: Perfect: ×1.5 Within 0.05s: ×1.3 Within 0.10s: ×1.2 Within 0.30s: ×1.1 Multipliers stack, so the more consecutive successes, the higher your potential score! LIMIT System Take 50 damage per second of error. Game over when LIMIT (HP) reaches zero. Maintain accurate timing to survive as long as possible! Free to Play Completely free to play. Continue your game by watching ads. Download now and test the precision of your internal clock!

Screenshots

チャレンジ!ストップウォッチ3 screens
Inner Clock Master2 screens

Verdict

The call

The clearest difference is ads: Inner Clock Master at none against チャレンジ!ストップウォッチ's shown. Inner Clock Master also leads on update cadence (every 4 days vs every 5 months). チャレンジ!ストップウォッチ's advantage is iOS requirement (11.0 vs 17.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

チャレンジ!ストップウォッチ ships an update every 5 months, Inner Clock Master every 4 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 3 level
チャレンジ!ストップウォッチ versus Inner Clock Master: the parameters behind the verdict, then further details
Parameterチャレンジ!ストップウォッチInner Clock Master
PriceFreeFree
Update frequencyEvery 5 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPod — betteriPhone
Requires iOS11.0 — better17.0
Further details — not scored
Size44 MB19 MB
Age rating4+4+
DeveloperGarhi Japan K.K.Ryoma Yanagimoto

In-app purchases

None

チャレンジ!ストップウォッチ

No in-app purchases

None

Inner Clock Master

No in-app purchases

Questions

Is チャレンジ!ストップウォッチ free?
チャレンジ!ストップウォッチ is free to download, with no in-app purchases.
Is Inner Clock Master free?
Inner Clock Master is free to download, with no in-app purchases.
Do チャレンジ!ストップウォッチ or Inner Clock Master have ads?
チャレンジ!ストップウォッチ shows ads; Inner Clock Master does not.
Which is updated more often, チャレンジ!ストップウォッチ or Inner Clock Master?
チャレンジ!ストップウォッチ ships an update every 5 months, and Inner Clock Master every 4 days. Most recently, チャレンジ!ストップウォッチ was updated on October 27, 2026 and Inner Clock Master on October 28, 2026.

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