# Biological clock vs Muchi Neko

The clearest difference is update cadence: Muchi Neko at every 5 days 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, Muchi Neko every 5 days. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Biological clock | Muchi Neko |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | — | Ad-supported |
| Size | 13 MB | 208 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HAREPPO](https://appshunter.io/developer/604325074) | [Seima Nakamoto](https://appshunter.io/developer/1780059847) |

## What reviewers say

### Biological clock

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

**In-app purchases:** none


### Muchi Neko

[App page](https://appshunter.io/ios/app/muchi-neko/id6745131464)

Care for adorable stray kittens by feeding them and playing quick puzzle games. Connect cute characters to earn coins, collect rare meals through gacha, and help your kitten find a loving forever home. Enjoy heartwarming moments and unique bonding experiences with your virtual pet.

**Highlights:** Feed and care for hungry kittens, Quick 60-second puzzle gameplay, Connect characters for high scores, Collect meals via gacha, Help kittens find forever homes, Receive letters from new families, Customize and name your kitten

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

**In-app purchases:** none


## Frequently asked questions

### Is Biological clock free?

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

### Is Muchi Neko free?

Muchi Neko is free to download, with no in-app purchases.

### Do Biological clock or Muchi Neko have ads?

Both Biological clock and Muchi Neko show ads.

### Which is updated more often, Biological clock or Muchi Neko?

Biological clock ships an update every 13 months, and Muchi Neko every 5 days. Most recently, Biological clock was updated on September 10, 2026 and Muchi Neko on September 18, 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.*