# DoFast vs Fasting Window

The clearest difference is update cadence: DoFast at every 2 months against Fasting Window's every 4 months. Fasting Window's advantage is iOS requirement (13.0 vs 15.0). 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.

DoFast ships an update every 2 months, Fasting Window every 4 months. The most recent releases landed on October 1, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | DoFast | Fasting Window |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 8 MB | 20 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Igor Lenderman](https://appshunter.io/developer/1886154638) | [HeungYeol Kim](https://appshunter.io/developer/1878087341) |

## What reviewers say

### DoFast

[App page](https://appshunter.io/ios/app/dofast-intermittent-fasting/id6760772207)

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

**In-app purchases:** none


### Fasting Window

[App page](https://appshunter.io/ios/app/fasting-window-if-timer/id6774622599)

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

**In-app purchases:** none


## Frequently asked questions

### Is DoFast free?

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

### Is Fasting Window free?

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

### Do DoFast or Fasting Window have ads?

Neither DoFast nor Fasting Window shows ads.

### Which is updated more often, DoFast or Fasting Window?

DoFast ships an update every 2 months, and Fasting Window every 4 months. Most recently, DoFast was updated on October 1, 2026 and Fasting Window on October 13, 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.*