# SimpleFFT vs Mix Notes

The clearest difference is in-app purchases: Mix Notes at none against SimpleFFT's 1. Mix Notes also leads on update cadence (every 10 days vs every 18 months). SimpleFFT's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

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

SimpleFFT ships an update every 18 months, Mix Notes every 10 days. The most recent releases landed on August 28, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | SimpleFFT | Mix Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mix-notes/id6753605213/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 18 months | **Every 10 days** |
| Monetization | — | Ad-supported |
| Size | 5 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [David Robert Thomas](https://appshunter.io/developer/1789637075) |

## 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 |


### Mix Notes

[App page](https://appshunter.io/ios/app/mix-notes/id6753605213)

Record voice notes and add annotations to audio tracks with a single touch. Compare different mixes using AB mode and ensure your notes are saved directly to the track. Easily manage and delete notes as needed.

**Highlights:** One-touch annotation, Voice note recording, AB mix comparison, Notes stored with track, Swipe to delete notes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is Mix Notes free?

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

### Do SimpleFFT or Mix Notes have ads?

Both SimpleFFT and Mix Notes show ads.

### Which is updated more often, SimpleFFT or Mix Notes?

SimpleFFT ships an update every 18 months, and Mix Notes every 10 days. Most recently, SimpleFFT was updated on August 28, 2026 and Mix Notes on September 13, 2026.

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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.*