# FastWindow vs Aayu

The clearest difference is in-app purchases: Aayu at none against FastWindow's 1. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | FastWindow | Aayu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 37 MB | 54 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [PROJECTSNAPLABS LTD](https://appshunter.io/developer/1889904681) | [Aayu Wellness Ltd](https://appshunter.io/developer/6775842467) |

## What reviewers say

### 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 |


### Aayu

[App page](https://appshunter.io/ios/app/aayu-intermittent-fasting/id6775842465)

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

**In-app purchases:** none


## Frequently asked questions

### Is FastWindow free?

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

### Is Aayu free?

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

### Do FastWindow or Aayu have ads?

Neither FastWindow nor Aayu 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.*