# DoFast vs Simple Fasting Timer

The clearest difference is in-app purchases: DoFast at none against Simple Fasting Timer's 1. DoFast also leads on iOS requirement (15.0 vs 17.6). Simple Fasting Timer's advantage is update cadence (daily vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Simple Fasting Timer sells 1 one-off in-app purchase. DoFast asks for nothing beyond the download.

DoFast ships an update every 2 months, Simple Fasting Timer daily. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | DoFast | Simple Fasting Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Size | 8 MB | 2 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Igor Lenderman](https://appshunter.io/developer/1886154638) | [Serghei Eschin](https://appshunter.io/developer/6774241012) |

## 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


### Simple Fasting Timer

[App page](https://appshunter.io/ios/app/simple-fasting-timer-168/id6787884048)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is DoFast free?

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

### Is Simple Fasting Timer free?

Simple Fasting Timer is free to download, with in-app purchases available.

### Do DoFast or Simple Fasting Timer have ads?

Neither DoFast nor Simple Fasting Timer shows ads.

### Which is updated more often, DoFast or Simple Fasting Timer?

DoFast ships an update every 2 months, and Simple Fasting Timer daily. Most recently, DoFast was updated on October 1, 2026 and Simple Fasting Timer on September 30, 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.*