# Brainy Sleuth vs 82億分の1

The clearest difference is ads: 82億分の1 at none against Brainy Sleuth's shown. 82億分の1 also leads on update cadence (every 5 months vs every 32 months) and monetization model (free vs ad-supported). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Brainy Sleuth ships an update every 32 months, 82億分の1 every 5 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Brainy Sleuth | 82億分の1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (43 ratings)](https://appshunter.io/ios/app/brainy-sleuth-riddle-quest/id1571292903/reviews)** | — |
| Number of ratings | **43** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 32 months | **Every 5 months** |
| Monetization | Ad-supported | **Free** |
| Size | 202 MB | 65 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [魂动天下](https://appshunter.io/developer/1395851580) | [Ikumi NAKAMURA](https://appshunter.io/developer/1632866319) |

## What reviewers say

### Brainy Sleuth

[App page](https://appshunter.io/ios/app/brainy-sleuth-riddle-quest/id1571292903)

This puzzle game offers over 500 challenging levels with diverse gameplay mechanics. It combines various puzzle types with unique mobile interactions for an engaging experience. Enjoy a humorous and educational journey through brain-teasing riddles.

**Highlights:** 500+ challenging levels, Brain-teasing riddles, Find the difference and hidden object gameplay, Unique mobile interactions, Humorous scenarios and answers, Educational content

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Brainy Sleuth free?

Brainy Sleuth is free to download, with no in-app purchases.

### Is 82億分の1 free?

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

### Do Brainy Sleuth or 82億分の1 have ads?

Brainy Sleuth shows ads; 82億分の1 does not.

### Which is updated more often, Brainy Sleuth or 82億分の1?

Brainy Sleuth ships an update every 32 months, and 82億分の1 every 5 months. Most recently, Brainy Sleuth was updated on November 3, 2026 and 82億分の1 on November 3, 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.*