# SimpleFFT — Frequency analysis

> Frequency analysis (iPhone/iPad app by HIROFUMI MARUO.)

- Source: https://appshunter.io/ios/app/simplefft/id1239257017 (this page in markdown: same URL + `.md`)
- Developer: [HIROFUMI MARUO](https://appshunter.io/developer/667820705)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 5 MB
- Languages: American English, Japanese
- Released: 2017-05-23
- Data updated: 2026-08-28
- User reviews in markdown: https://appshunter.io/ios/app/simplefft/id1239257017/reviews.md

## What is SimpleFFT?

This app can easily analyze the frequency of sound.
For the sound of the recording file recorded at each refresh time interval, FFT is executed and displayed for the four voices collected one after another at each refresh interval.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Version history (last 5 releases)

### 2.1 — 2025-12-12

Fixed some minor bugs.

### 2.0 — 2025-04-14

Added premium features (in-app purchases).

### 1.3 — 2021-03-08

-Added graph display.
-The minimum refresh interval has been reduced to 0.2 seconds.

### 1.2 — 2019-09-15

Support new iOS.

### 1.1 — 2017-07-07

・周波数の対数表示に対応しました。
・表示を細くしました。

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## More apps by HIROFUMI MARUO

- [SoundWatch](https://appshunter.io/ios/app/soundwatch/id688680039)
- [SuperSWD](https://appshunter.io/ios/app/superswd/id760491884)
- [SWDMailer](https://appshunter.io/ios/app/swdmailer/id779421888)
- [DrvRec](https://appshunter.io/ios/app/drvrec/id809321587)
- [HoldBaby](https://appshunter.io/ios/app/holdbaby/id821304732)
- [e-Nurse](https://appshunter.io/ios/app/e-nurse/id838752553)

All apps by HIROFUMI MARUO: https://appshunter.io/developer/667820705

## Related topics

[fftwave](https://appshunter.io/ios/topics/fftwave) · [fft plot](https://appshunter.io/ios/topics/fft-plot)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*