# RTA Audio vs DSP

The clearest difference is in-app purchases: DSP at none against RTA Audio's 1. DSP also leads on iOS requirement (8.3 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RTA Audio sells 1 one-off in-app purchase. DSP asks for nothing beyond the download.

RTA Audio ships an update every 28 months, DSP every 18 months. The most recent releases landed on October 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | RTA Audio | DSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (31 ratings)](https://appshunter.io/ios/app/rta-audio/id525324684/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 58.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 18 months** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 45 MB |
| Requires iOS | 15.6 | **8.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [New Ball s.r.o.](https://appshunter.io/developer/1178970340) | [AllDSP GmbH & Co. KG.](https://appshunter.io/developer/874361428) |

## What reviewers say

### RTA Audio

[App page](https://appshunter.io/ios/app/rta-audio/id525324684)

Analyze audio in real-time with detailed frequency spectrum and waveform visualizations. Record and export your audio analysis results, including spectrograms and frequency tables, for sharing or archiving.

**Highlights:** Real-time audio analysis (FFT), Recording and offline processing, Spectrogram and waveform visualization, Exportable analysis reports (PDF), Adjustable resolution and frequency scale, Peak and RMS metering

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to full version | $14.99 | one-time |


### DSP

[App page](https://appshunter.io/ios/app/dsp-control/id874361425)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RTA Audio free?

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

### Is DSP free?

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

### Do RTA Audio or DSP have ads?

Neither RTA Audio nor DSP shows ads.

### Which is updated more often, RTA Audio or DSP?

RTA Audio ships an update every 28 months, and DSP every 18 months. Most recently, RTA Audio was updated on October 15, 2026 and DSP on September 25, 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.*