# Crescendo Flow vs Keep The Fly

The clearest difference is in-app purchases: Keep The Fly at none against Crescendo Flow's 1. Keep The Fly also leads on iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Crescendo Flow sells 1 one-off in-app purchase. Keep The Fly asks for nothing beyond the download.

## The numbers

| Metric | Crescendo Flow | Keep The Fly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Size | 227 MB | 36 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Badre HOUIBI](https://appshunter.io/developer/1860718696) | [Stratton Apps SL](https://appshunter.io/developer/1483140675) |

## What reviewers say

### Crescendo Flow

[App page](https://appshunter.io/ios/app/crescendo-flow/id6784260308)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $2.99 | one-time |


### Keep The Fly

[App page](https://appshunter.io/ios/app/keep-the-fly/id6788649714)

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

**In-app purchases:** none


## Frequently asked questions

### Is Crescendo Flow free?

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

### Is Keep The Fly free?

Keep The Fly is free to download, with no in-app purchases.

### Do Crescendo Flow or Keep The Fly have ads?

Both Crescendo Flow and Keep The Fly show 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.*