# 82億分の1 vs 2択　~Left or Right~

The clearest difference is ads: 82億分の1 at none against 2択　~Left or Right~'s shown. 2択　~Left or Right~'s advantage is update cadence (weekly vs every 5 months) and iOS requirement (12.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

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

82億分の1 ships an update every 5 months, 2択　~Left or Right~ weekly. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 82億分の1 | 2択　~Left or Right~ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | — |
| Size | 65 MB | 115 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ikumi NAKAMURA](https://appshunter.io/developer/1632866319) | [Masaaki Okajima](https://appshunter.io/developer/1739702303) |

## What reviewers say

### 82億分の1

[App page](https://appshunter.io/ios/app/821/id6445803814)

Compete globally to achieve the highest score by tapping to hit a set probability. Aim for the world's best score and test your tapping speed in a special mode. Compete for world records in 5 or 10-second bursts.

**Highlights:** Set tap probability, Score based on hits, Global score competition, Aim for world's best, Rapid tap mode, World record attempts

**Features:** Vision Pro support

**In-app purchases:** none


### 2択　~Left or Right~

[App page](https://appshunter.io/ios/app/2-left-or-right/id6502887629)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 82億分の1 free?

82億分の1 is free to download, with no in-app purchases.

### Is 2択　~Left or Right~ free?

2択　~Left or Right~ is free to download, with no in-app purchases.

### Do 82億分の1 or 2択　~Left or Right~ have ads?

2択　~Left or Right~ shows ads; 82億分の1 does not.

### Which is updated more often, 82億分の1 or 2択　~Left or Right~?

82億分の1 ships an update every 5 months, and 2択　~Left or Right~ weekly. Most recently, 82億分の1 was updated on October 15, 2026 and 2択　~Left or Right~ on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*