# Biological clock vs ThatRoulette

The clearest difference is in-app purchases: Biological clock at none against ThatRoulette's 3. Biological clock also leads on iOS requirement (12.1 vs 17.0). ThatRoulette's advantage is ads (none vs shown) and update cadence (every 5 days vs every 13 months). On price and device support there is nothing between them.

Both are free to download. ThatRoulette sells 3 in-app purchases, starting at $4.99 per month. Biological clock asks for nothing beyond the download.

Biological clock ships an update every 13 months, ThatRoulette every 5 days. The most recent releases landed on September 10, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Biological clock | ThatRoulette |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 5 days** |
| Size | 13 MB | 8 MB |
| Requires iOS | **12.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [HAREPPO](https://appshunter.io/developer/604325074) | [Infinity Inc. (Apps)](https://appshunter.io/developer/1680741877) |

## What reviewers say

### Biological clock

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

**In-app purchases:** none


### ThatRoulette

[App page](https://appshunter.io/ios/app/thatroulette/id6736842060)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $4.99 | per month |
| Remove Ads (Yearly) | $44.99 | per year |
| Remove ads | $4.99 | one-time |


## Frequently asked questions

### Is Biological clock free?

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

### Is ThatRoulette free?

ThatRoulette is free to download, with in-app purchases available.

### Do Biological clock or ThatRoulette have ads?

Biological clock shows ads; ThatRoulette does not.

### Which is updated more often, Biological clock or ThatRoulette?

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