# Fast vs FastWindow

The clearest difference is in-app purchases: Fast at none against FastWindow's 1. FastWindow's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. FastWindow sells 1 one-off in-app purchase. Fast asks for nothing beyond the download.

## The numbers

| Metric | Fast | FastWindow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | — |
| Size | 6 MB | 37 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Invotek AS](https://appshunter.io/developer/1836667478) | [PROJECTSNAPLABS LTD](https://appshunter.io/developer/1889904681) |

## What reviewers say

### Fast

[App page](https://appshunter.io/ios/app/fast-e-intermittent-fasting/id6759206116)

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

**In-app purchases:** none


### FastWindow

[App page](https://appshunter.io/ios/app/fastwindow-fasting-timer/id6764386746)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastWindow Pro | $4.99 | one-time |


## Frequently asked questions

### Is Fast free?

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

### Is FastWindow free?

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

### Do Fast or FastWindow have ads?

Neither Fast nor FastWindow shows ads.

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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.*