# Fasting Clock vs Fly Robin

The clearest difference is in-app purchases: Fasting Clock at none against Fly Robin's 2. Fasting Clock also leads on iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fly Robin sells 2 in-app purchases, starting at $2.99 per month. Fasting Clock asks for nothing beyond the download.

Fasting Clock ships an update every 4 months, Fly Robin every 2 months. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Fasting Clock | Fly Robin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 3 MB | 12 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) | [SULE ERDOGAN](https://appshunter.io/developer/1711961038) |

## What reviewers say

### Fasting Clock

[App page](https://appshunter.io/ios/app/fasting-clock-168-omad-log/id6772257547)

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

**In-app purchases:** none


### Fly Robin

[App page](https://appshunter.io/ios/app/fly-robin/id6775573079)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Robin Plus | $2.99 | per month |
| Robin Plus | $19.99 | per year |


## Frequently asked questions

### Is Fasting Clock free?

Fasting Clock is free to download, with no in-app purchases.

### Is Fly Robin free?

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

### Do Fasting Clock or Fly Robin have ads?

Neither Fasting Clock nor Fly Robin shows ads.

### Which is updated more often, Fasting Clock or Fly Robin?

Fasting Clock ships an update every 4 months, and Fly Robin every 2 months. Most recently, Fasting Clock was updated on October 11, 2026 and Fly Robin 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.*