# 9toFast vs Fasting Window

The clearest difference is in-app purchases: Fasting Window at none against 9toFast's 3. Fasting Window also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.1). 9toFast's advantage is update cadence (fortnightly vs every 4 months). On price and device support there is nothing between them.

Both are free to download. 9toFast sells 3 in-app purchases, starting at $0.99 per month. Fasting Window asks for nothing beyond the download.

9toFast ships an update fortnightly, Fasting Window every 4 months. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 9toFast | Fasting Window |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 47 MB | 20 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Esther Yekini](https://appshunter.io/developer/1847063956) | [HeungYeol Kim](https://appshunter.io/developer/1878087341) |

## What reviewers say

### 9toFast

[App page](https://appshunter.io/ios/app/9tofast/id6754204142)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $9.99 | per year |
| Premium Lifetime | $19.99 | one-time |


### 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 9toFast free?

9toFast is free to download, with in-app purchases available.

### Is Fasting Window free?

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

### Do 9toFast or Fasting Window have ads?

9toFast shows ads; Fasting Window does not.

### Which is updated more often, 9toFast or Fasting Window?

9toFast ships an update fortnightly, and Fasting Window every 4 months. Most recently, 9toFast was updated on October 15, 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.*