1/2 one vs ONE HALF
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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/
ONE HALF
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Among the two choices displayed, only one is the correct answer. Challenge yourself to see how long you can keep choosing correctly in a row. If you pick incorrectly, you’ll have to start over — but you can retry once by watching an ad. You can view your past records as well as your success rate compared to all players under “Record so far”
Screenshots
Verdict
The clearest difference is update cadence: ONE HALF at every 2 days against 1/2 one's every 2 months. 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.
1/2 one ships an update every 2 months, ONE HALF every 2 days. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.
| Parameter | 1/2 one | ONE HALF |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 49 MB | 4 MB |
| Age rating | 9+ | 4+ |
| Developer | gravass, Inc. | ITOTSUKA |
In-app purchases
1/2 one
No in-app purchases
ONE HALF
No in-app purchases
