# Retro Pocket Synth vs Index Theremin

The clearest difference is ads: Index Theremin at none against Retro Pocket Synth's shown. Retro Pocket Synth's advantage is iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support 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 | Retro Pocket Synth | Index Theremin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | — | Every 3 weeks |
| Size | 41 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [asywalul fikri](https://appshunter.io/developer/6810924195) | [NOAH REMI FINN BESENDORFER STAHLHACKE](https://appshunter.io/developer/1836253254) |

## What reviewers say

### Retro Pocket Synth

[App page](https://appshunter.io/ios/app/retro-pocket-synth/id6815741720)

**Features:** macOS Compatibility

**In-app purchases:** none


### Index Theremin

[App page](https://appshunter.io/ios/app/index-theremin/id6818808236)

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

**In-app purchases:** none


## Frequently asked questions

### Is Retro Pocket Synth free?

Retro Pocket Synth is free to download, with no in-app purchases.

### Is Index Theremin free?

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

### Do Retro Pocket Synth or Index Theremin have ads?

Retro Pocket Synth shows ads; Index Theremin 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.*