# Phosphor Emulator vs Keep The Fly

The clearest difference is ads: Phosphor Emulator at none against Keep The Fly's shown. Phosphor Emulator also leads on device support (4 vs 2). Keep The Fly's advantage is iOS requirement (13.0 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Phosphor Emulator | Keep The Fly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (30 ratings)](https://appshunter.io/ios/app/phosphor-emulator/id6759676286/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 36 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SquatchCraft LLC](https://appshunter.io/developer/1440325922) | [Stratton Apps SL](https://appshunter.io/developer/1483140675) |

## What reviewers say

### Phosphor Emulator

[App page](https://appshunter.io/ios/app/phosphor-emulator/id6759676286)

This app provides a premium emulation experience for Game Boy, Game Boy Color, and Game Boy Advance games on modern iOS devices. It features advanced controls, instant save states, and unique functionalities like rewinding gameplay and AI play.

**Highlights:** Rewind and fast-forward gameplay, Instant save and load states, Customizable touch controls, MFi controller support, Game Boy Camera and Printer integration, AI Play feature

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### 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 Phosphor Emulator free?

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

### Is Keep The Fly free?

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

### Do Phosphor Emulator or Keep The Fly have ads?

Keep The Fly shows ads; Phosphor Emulator does not.

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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.*