# variStretch vs FFT AUv3 Visualizer

The clearest difference is price: FFT AUv3 Visualizer at $0.99 against variStretch's $5.99. variStretch's advantage is iOS requirement (12.0 vs 15.0). On rating, ratings volume, update cadence and ads there is nothing between them.

variStretch costs $5.99 and FFT AUv3 Visualizer $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for variStretch against 5.0 for FFT AUv3 Visualizer. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

variStretch ships an update every 7 months, FFT AUv3 Visualizer every 8 months. The most recent releases landed on September 6, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | variStretch | FFT AUv3 Visualizer |
| --- | --- | --- |
| Price | $5.99 | **$0.99** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/varistretch/id6744925479/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/fft-auv3-visualizer/id6746331702/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 8 months |
| Monetization | Paid | Paid |
| Size | 15 MB | 12 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Satoshi Kajii](https://appshunter.io/developer/1777441634) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### variStretch

[App page](https://appshunter.io/ios/app/varistretch/id6744925479)

This app allows real-time audio speed manipulation without altering pitch. It offers three distinct playback modes and adjustable buffer settings for precise control over sound processing.

**Highlights:** Real-time speed adjustment (0.5-2.0x), Tape mode (speed & pitch change), Phase Vocoder mode (speed only), Adjustable buffer size, Buffer clear function, AUv3 host compatibility

**In-app purchases:** none


### FFT AUv3 Visualizer

[App page](https://appshunter.io/ios/app/fft-auv3-visualizer/id6746331702)

This real-time spectral analyzer visualizes audio into spectrograms with high precision. It offers advanced features like mel-scale mapping and intelligent color coding to help musicians and audio engineers analyze sound frequencies for mixing, mastering, and sound design.

**Highlights:** Real-time spectral analysis, High-resolution 4096-sample FFT, Mel-scale frequency mapping, 90dB dynamic range with intelligent color mapping, Resizable interface, 60Hz display with 75% overlap

**In-app purchases:** none


## Frequently asked questions

### Is variStretch free?

variStretch costs $5.99, with no in-app purchases.

### Is FFT AUv3 Visualizer free?

FFT AUv3 Visualizer costs $0.99, with no in-app purchases.

### Which has better reviews, variStretch or FFT AUv3 Visualizer?

variStretch and FFT AUv3 Visualizer are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do variStretch or FFT AUv3 Visualizer have ads?

Neither variStretch nor FFT AUv3 Visualizer shows ads.

### Which is updated more often, variStretch or FFT AUv3 Visualizer?

variStretch ships an update every 7 months, and FFT AUv3 Visualizer every 8 months. Most recently, variStretch was updated on September 6, 2026 and FFT AUv3 Visualizer on September 20, 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.*