# Biological clock vs 毎日脳トレ！NUMBER

The clearest difference is update cadence: 毎日脳トレ！NUMBER at every 2 months against Biological clock's every 13 months. On price, ads, 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.

Biological clock ships an update every 13 months, 毎日脳トレ！NUMBER every 2 months. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Biological clock | 毎日脳トレ！NUMBER |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | — | Ad-supported |
| Size | 13 MB | 96 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HAREPPO](https://appshunter.io/developer/604325074) | [ZERONE](https://appshunter.io/developer/1708775781) |

## What reviewers say

### Biological clock

[App page](https://appshunter.io/ios/app/biological-clock-everywhere/id1099546322)

**Features:** Vision Pro support

**In-app purchases:** none


### 毎日脳トレ！NUMBER

[App page](https://appshunter.io/ios/app/number/id1467748381)

Test your brain age with a simple puzzle game. Find the number closest to the given subject by tapping. The more you play, the more your brain is activated.

**Highlights:** Brain age check, Simple puzzle gameplay, Tap-based interaction, Brain activation, Number matching

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Biological clock free?

Biological clock is free to download, with no in-app purchases.

### Is 毎日脳トレ！NUMBER free?

毎日脳トレ！NUMBER is free to download, with no in-app purchases.

### Do Biological clock or 毎日脳トレ！NUMBER have ads?

Both Biological clock and 毎日脳トレ！NUMBER show ads.

### Which is updated more often, Biological clock or 毎日脳トレ！NUMBER?

Biological clock ships an update every 13 months, and 毎日脳トレ！NUMBER every 2 months. Most recently, Biological clock was updated on October 8, 2026 and 毎日脳トレ！NUMBER on October 16, 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.*