# Fast vs Window

The clearest difference is ads: Window at none against Fast's shown. Window also leads on update cadence (every 9 days vs every 12 months). Fast's advantage is iOS requirement (13.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Fast sells 2 in-app purchases, starting at $4.99 per month and Window sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Fast ships an update every 12 months, Window every 9 days. The most recent releases landed on September 9, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | Fast | Window |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/window-fasting-timer/id6757469789/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 74 MB | 7 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [kota tada](https://appshunter.io/developer/1658942612) | [发发 道](https://appshunter.io/developer/1812431550) |

## What reviewers say

### Fast

[App page](https://appshunter.io/ios/app/fast-fasting-timer/id6743695812)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-free for 1 month | $4.99 | per month |
| Ad-free for 1 year | $49.99 | per year |


### Window

[App page](https://appshunter.io/ios/app/window-fasting-timer/id6757469789)

This intermittent fasting timer helps you build healthy eating habits with real-time progress tracking and motivational animations. View your fasting status on the Lock Screen and Dynamic Island without opening the app. Track your history, streaks, and success rate with local data storage and no ads.

**Highlights:** One-tap fasting start, Real-time progress tracking, Dynamic Island & Live Activities integration, Preset and custom fasting durations, Fasting history and statistics, Local data storage

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Window Pro | $0.99 | one-time |


## Frequently asked questions

### Is Fast free?

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

### Is Window free?

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

### Do Fast or Window have ads?

Fast shows ads; Window does not.

### Which is updated more often, Fast or Window?

Fast ships an update every 12 months, and Window every 9 days. Most recently, Fast was updated on September 9, 2026 and Window on June 7, 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.*