# SimpleFFT vs Rosetta

The clearest difference is in-app purchases: Rosetta at none against SimpleFFT's 1. Rosetta also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | SimpleFFT | Rosetta |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | — |
| Size | 5 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [Optiwise](https://appshunter.io/developer/1559472272) |

## What reviewers say

### SimpleFFT

[App page](https://appshunter.io/ios/app/simplefft/id1239257017)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Functions | $0.49 | one-time |


### Rosetta

[App page](https://appshunter.io/ios/app/rosetta-unit-converter/id6766109378)

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

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is Rosetta free?

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

### Do SimpleFFT or Rosetta have ads?

SimpleFFT shows ads; Rosetta 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.*