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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This is a game where you challenge yourself to see how many times in a row you can guess the correct answer with a probability of 1/2. Please choose one from the two options "L" and "R". If you answer correctly, the probability of consecutive correct answers at that point will be displayed. You can redo your selection only once during a series of correct answers. *If you try again, the correct answer choices will be drawn again. We plan to continue updating and adding features in the future.
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 6 weeks. 1/2 one's advantage is iOS requirement (14.0 vs 17.0). 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 6 weeks, ONE HALF every 2 days. The most recent releases landed on June 1, 2026 and May 17, 2026 respectively.
| Parameter | 1/2 one | ONE HALF |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 6 weeks | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 63 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
