# SimpleFFT vs Spectrolite

The clearest difference is ads: Spectrolite at none against SimpleFFT's shown. Spectrolite also leads on update cadence (every 8 months vs every 18 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. SimpleFFT sells 1 one-off in-app purchase and Spectrolite sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SimpleFFT ships an update every 18 months, Spectrolite every 8 months. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | SimpleFFT | Spectrolite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (51 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** |
| Number of ratings | — | **51** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 8 months** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 1 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [Waxing Wave](https://appshunter.io/developer/392942046) |

## 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 |


### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.

**Highlights:** Real-time spectrogram visualization, Constant-Q, linear, and mel frequency scales, Full human hearing frequency range, Intuitive touch panning and zooming, Adjustable gain, Q, and other parameters, Pro version: grids, scales, spectrum view, tap-to-measure

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


## Frequently asked questions

### Is SimpleFFT free?

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

### Is Spectrolite free?

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

### Do SimpleFFT or Spectrolite have ads?

SimpleFFT shows ads; Spectrolite does not.

### Which is updated more often, SimpleFFT or Spectrolite?

SimpleFFT ships an update every 18 months, and Spectrolite every 8 months. Most recently, SimpleFFT was updated on September 28, 2026 and Spectrolite on September 23, 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.*