# RTA Pro vs UniKey

The clearest difference is price: UniKey at Free against RTA Pro's $5.99. UniKey also leads on iOS requirement (15.6 vs 17.6). RTA Pro's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

UniKey is free to download; RTA Pro costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RTA Pro ships an update every 3 months, UniKey every 4 months. The most recent releases landed on November 6, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | RTA Pro | UniKey |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/rta-pro/id703753970/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Paid | — |
| Size | 12 MB | 41 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Schorer](https://appshunter.io/developer/290579382) | [DONALD PAUL FULDAUER JR](https://appshunter.io/developer/1864666202) |

## What reviewers say

### RTA Pro

[App page](https://appshunter.io/ios/app/rta-pro/id703753970)

Transform your iOS device into a professional audio analysis tool. Analyze ambient noise frequencies, pinpoint room resonance, and set up sound systems for events. Features include custom calibration, multiple display modes, and adjustable speed settings.

**Highlights:** Real-time audio spectrum analysis, Frequency range 32Hz to 16kHz, Linear, dB(A), and dB(C) weightings, 1/3 Octave Bands, Octave Bands, and FFT display, Adjustable speed settings, Custom calibration options

**In-app purchases:** none


### UniKey

[App page](https://appshunter.io/ios/app/unikey/id6757115918)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RTA Pro free?

RTA Pro costs $5.99, with no in-app purchases.

### Is UniKey free?

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

### Do RTA Pro or UniKey have ads?

UniKey shows ads; RTA Pro does not.

### Which is updated more often, RTA Pro or UniKey?

RTA Pro ships an update every 3 months, and UniKey every 4 months. Most recently, RTA Pro was updated on November 6, 2026 and UniKey on October 28, 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.*