鼻に指をドーン！ vs 1/2 one
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
鼻に指をドーン！
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鼻の穴に指をドーン！と入れるだけ！ 画面タップでタイミングを合わせて指を入れろ！
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 ads: 鼻に指をドーン！ at none against 1/2 one's shown. 鼻に指をドーン！ also leads on review sentiment (79% vs 50%) and iOS requirement (8.0 vs 16.4). 1/2 one's advantage is update cadence (every 2 months vs every 31 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.
鼻に指をドーン！ ships an update every 31 months, 1/2 one every 2 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | 鼻に指をドーン！ | 1/2 one |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 79.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 5 — better | — |
| Update frequency | Every 31 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 37 MB | 49 MB |
| Age rating | 4+ | 9+ |
| Developer | kazunori kubota | gravass, Inc. |
Customer experience
鼻に指をドーン！
1/2 one
In-app purchases
鼻に指をドーン！
No in-app purchases
1/2 one
No in-app purchases
