PerfectTimingChallenge vs 1/2 one
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
PerfectTimingChallenge
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◆30秒ぴったりでストップウォッチを止めるだけのシンプルなゲーム◆ 目標時間を設定したら、Startボタンで開始。30秒経ったと思ったらStopを押して、結果を見てみよう！というゲームです。 本当にそれだけです。暇つぶしにぴったり！ ただ、誤差0.00秒になるとちょっとメッセージが変わります。せっかくなのでそこを目指してみてください。 大学のFlutterの授業で作成し、せっかくならAppStoreに上げてみようと作りました。 たくさん遊んでいただけたら嬉しいです。 メッセージはぜひ、AppStoreの「アプリサポート」からお寄せください！ ※右上の電球ボタンから遊び方を確認できます。 ※本アプリにはGoogleが提供するAdmobを使用しバナー広告を表示しております。 ※端末本体の文字サイズ設定によっては、画面がうまく表示されないことがあります。
1/2 one
Test your luck and strategy in this simple guessing game. Aim for consecutive correct answers with a 50/50 chance, and track your progress. You get one chance to redo a selection per streak.
- 50/50 guessing mechanic
- Consecutive correct answer tracking
- Single redo per streak
- Probability display
- Simple L/R choices
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Keep picking 1/2 and chase the odds that almost never happen! A simple game: how many times in a row can you call a 50/50 correctly? ■ How to play ・Pick one of two: "L" or "R" ・On a hit, the probability of your streak so far is shown (1/2 → 1/4 → 1/8 …) ・On a miss, the streak goes into RECORDS and you start over ・Once per streak you can watch an ad to redo your choice (the answer is drawn again). Redo can be switched ON / OFF ■ Records ・RECORDS: how many times you reached each streak, and your total runs ・HISTORY: the winning side of your last 13 picks ■ Version 2.0.0 (complete remake) ・Rebuilt from the ground up with a new design ・Added hit / miss effects and haptic feedback ・After a miss, your last streak stays readable ・Redo is only offered when an ad is ready ・Supports iPad and larger text sizes ・Your existing records carry over This app shows ads (banner, interstitial and rewarded). Terms of Use: https://www.gravass.co.jp/apps/terms/ Privacy Policy: https://www.gravass.co.jp/apps/privacy/
Screenshots
Verdict
The clearest difference is update cadence: PerfectTimingChallenge at weekly against 1/2 one's every 2 months. PerfectTimingChallenge also leads on iOS requirement (12.0 vs 16.4). On price, ads, 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.
PerfectTimingChallenge ships an update weekly, 1/2 one every 2 months. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.
| Parameter | PerfectTimingChallenge | 1/2 one |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| Update frequency | Weekly — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 29 MB | 49 MB |
| Age rating | 4+ | 9+ |
| Developer | Akari Ohta | gravass, Inc. |
In-app purchases
PerfectTimingChallenge
No in-app purchases
1/2 one
No in-app purchases
Questions
Is PerfectTimingChallenge free?
Is 1/2 one free?
Do PerfectTimingChallenge or 1/2 one have ads?
Which is updated more often, PerfectTimingChallenge or 1/2 one?
Other comparisons
