# Biological clock vs Block With U

The clearest difference is update cadence: Block With U at every 3 months against Biological clock's every 13 months. Biological clock's advantage is iOS requirement (12.1 vs 16.6). 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, Block With U every 3 months. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Biological clock | Block With U |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | — | Ad-supported |
| Size | 13 MB | 78 MB |
| Requires iOS | **12.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HAREPPO](https://appshunter.io/developer/604325074) | [Tomohide Iwadate](https://appshunter.io/developer/1444532887) |

## What reviewers say

### Biological clock

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

**In-app purchases:** none


### Block With U

[App page](https://appshunter.io/ios/app/block-with-u/id1444532888)

Navigate through 50 challenging stages in this engaging game. Enjoy a fun and interactive experience with simple mechanics. Perfect for quick play sessions.

**Highlights:** 50 distinct stages, Engaging gameplay, Simple mechanics, Quick play sessions, Designed for fun

**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 Block With U free?

Block With U is free to download, with no in-app purchases.

### Do Biological clock or Block With U have ads?

Both Biological clock and Block With U show ads.

### Which is updated more often, Biological clock or Block With U?

Biological clock ships an update every 13 months, and Block With U every 3 months. Most recently, Biological clock was updated on September 10, 2026 and Block With U on September 8, 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.*