# DoFast vs Vasten

The clearest difference is update cadence: Vasten at every 2 days against DoFast's every 2 months. DoFast's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.5). On price, ads and in-app purchases 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, Vasten every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | DoFast | Vasten |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 8 MB | 2 MB |
| Requires iOS | **15.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Igor Lenderman](https://appshunter.io/developer/1886154638) | [Dennis Van Dalen](https://appshunter.io/developer/1862992231) |

## 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


### Vasten

[App page](https://appshunter.io/ios/app/vasten-fasting-timer/id6791755315)

**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 Vasten free?

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

### Do DoFast or Vasten have ads?

Neither DoFast nor Vasten shows ads.

### Which is updated more often, DoFast or Vasten?

DoFast ships an update every 2 months, and Vasten every 2 days. Most recently, DoFast was updated on October 31, 2026 and Vasten on October 31, 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.*