# FFT Plot vs Strum Machine

The clearest difference is price: Strum Machine at Free against FFT Plot's $9.99. Strum Machine also leads on update cadence (fortnightly vs every 17 months) and chart position (#161 vs unranked). FFT Plot's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.4). On rating, review sentiment, ratings volume and ads there is nothing between them.

Strum Machine is free to download; FFT Plot costs $9.99 up front. Strum Machine sells 1 in-app purchase, starting at $4.99 per month. FFT Plot asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for FFT Plot against 4.7 for Strum Machine. Both are backed by a comparable volume of ratings — 90 and 118 respectively. Written reviews are what separate them: 84% of FFT Plot's written reviews are positive against 89% of Strum Machine's.

FFT Plot ships an update every 17 months, Strum Machine fortnightly. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FFT Plot | Strum Machine |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (90 ratings)](https://appshunter.io/ios/app/fft-plot/id569468015/reviews)** | [4.7 (118 ratings)](https://appshunter.io/ios/app/strum-machine-backing-tracks/id1509158553/reviews) |
| Number of ratings | 90 | **118** |
| Positive reviews | 84.4% of reviews | **88.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#161** |
| Size | 7 MB | 77 MB |
| Requires iOS | **11.0** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [Luke Abbott LLC](https://appshunter.io/developer/1509158552) |

## What reviewers say

### FFT Plot

[App page](https://appshunter.io/ios/app/fft-plot/id569468015)

This real-time audio analysis app provides precision sound measurement and visualization. It's ideal for detecting sound issues, room tuning, and speaker calibration, offering detailed frequency analysis for musicians and audio professionals.

**Highlights:** Real-time audio analysis, Frequency detection, Averaging options, Window functions, Linear and logarithmic scales, Weighting options, Draggable cursors

**In-app purchases:** none


### Strum Machine

[App page](https://appshunter.io/ios/app/strum-machine-backing-tracks/id1509158553)

**Currently charting:** #161 Top Grossing · Music (US App Store)

Generate realistic backing tracks for practice with real instrument audio. Customize chord progressions, keys, and tempo. Features a large song library, song editor, and band customization options. Works offline and syncs across devices.

**Highlights:** Realistic instrument audio backing tracks, Customizable chord progressions, keys, and tempo, Extensive song library, Simple song editor, Band and instrument customization, Cross-platform syncing and offline mode

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |


## Frequently asked questions

### Is FFT Plot free?

FFT Plot costs $9.99, with no in-app purchases.

### Is Strum Machine free?

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

### Which has better reviews, FFT Plot or Strum Machine?

FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Strum Machine averages 4.7 from 118 ratings.

### Do FFT Plot or Strum Machine have ads?

Neither FFT Plot nor Strum Machine shows ads.

### Which is updated more often, FFT Plot or Strum Machine?

FFT Plot ships an update every 17 months, and Strum Machine fortnightly. Most recently, FFT Plot was updated on September 23, 2026 and Strum Machine on September 24, 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.*