# SimpleFFT vs KeepWaves

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

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

## The numbers

| Metric | SimpleFFT | KeepWaves |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/keepwaves/id6742164032/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | — |
| Monetization | — | Free |
| Size | 5 MB | 37 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [Arla Services](https://appshunter.io/developer/1793706092) |

## 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 |


### KeepWaves

[App page](https://appshunter.io/ios/app/keepwaves/id6742164032)

Transform audio recordings into visual art with customizable waveform visualizations. Capture high-quality sound, apply effects, and share your unique acoustic memories as audio, images, or videos. Preserve precious sounds in a way that engages both sight and hearing.

**Highlights:** Customizable waveform visualizations, High-quality audio recording, Real-time visualization, Advanced audio processing, Multiple export options (audio, image, video), Intuitive organization and search, Interactive playback

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is KeepWaves free?

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

### Do SimpleFFT or KeepWaves have ads?

SimpleFFT shows ads; KeepWaves 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.*