# User Scale vs Spectrum AUv3 FFT Visualizer

The clearest difference is price: User Scale at Free against Spectrum AUv3 FFT Visualizer's $0.99. User Scale also leads on iOS requirement (8.1 vs 15.0). Spectrum AUv3 FFT Visualizer's advantage is device support (3 vs 1). On update cadence, ads and in-app purchases there is nothing between them.

User Scale is free to download; Spectrum AUv3 FFT Visualizer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

User Scale ships an update every 13 months, Spectrum AUv3 FFT Visualizer every 12 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | User Scale | Spectrum AUv3 FFT Visualizer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/user-scale/id579231060/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 12 months** |
| Monetization | Free | — |
| Size | 8 MB | 10 MB |
| Requires iOS | **8.1** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roland Corporation](https://appshunter.io/developer/387333694) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### User Scale

[App page](https://appshunter.io/ios/app/user-scale/id579231060)

This iPad application allows musicians to control the tuning scale of their Roland instruments. It enables real-time adjustments to key tunings, applying consistent values across notes of the same name during performances.

**Highlights:** Control tuning scale with iPad, Change instrument key tunings, Apply consistent tuning values, Real-time performance control

**In-app purchases:** none


### Spectrum AUv3 FFT Visualizer

[App page](https://appshunter.io/ios/app/spectrum-auv3-fft-visualizer/id6737164438)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is User Scale free?

User Scale is free to download, with no in-app purchases.

### Is Spectrum AUv3 FFT Visualizer free?

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

### Do User Scale or Spectrum AUv3 FFT Visualizer have ads?

Neither User Scale nor Spectrum AUv3 FFT Visualizer shows ads.

### Which is updated more often, User Scale or Spectrum AUv3 FFT Visualizer?

User Scale ships an update every 13 months, and Spectrum AUv3 FFT Visualizer every 12 months. Most recently, User Scale was updated on September 30, 2026 and Spectrum AUv3 FFT Visualizer on October 1, 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.*