# SimpleFFT vs TFR

The clearest difference is in-app purchases: TFR at none against SimpleFFT's 1. TFR also leads on iOS requirement (11.3 vs 15.0). SimpleFFT's advantage is device support. On price there is nothing between them.

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

## The numbers

| Metric | SimpleFFT | TFR |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 18 months | — |
| Size | 5 MB | 28 MB |
| Requires iOS | 15.0 | **11.3** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [ADN STATE CO.,LTD.](https://appshunter.io/developer/1615908778) |

## 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 |


### TFR

[App page](https://appshunter.io/ios/app/tfr/id1615908776)

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is TFR free?

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

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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.*