# RTA Pro vs Spectrolite

The clearest difference is price: Spectrolite at Free against RTA Pro's $5.99. Spectrolite also leads on review sentiment (83% vs 50%) and rating (4.8 vs 4.5). RTA Pro's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 8 months). On ads and device support there is nothing between them.

Spectrolite is free to download; RTA Pro costs $5.99 up front. Spectrolite sells 1 one-off in-app purchase. RTA Pro asks for nothing beyond the download.

Spectrolite holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Spectrolite has 51 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of RTA Pro's written reviews are positive against 83% of Spectrolite's.

RTA Pro ships an update every 3 months, Spectrolite every 8 months. The most recent releases landed on September 13, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | RTA Pro | Spectrolite |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/rta-pro/id703753970/reviews) | **[4.8 (51 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** |
| Number of ratings | 2 | **51** |
| Positive reviews | 50.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#188** | — |
| Size | 12 MB | 1 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) | [Waxing Wave](https://appshunter.io/developer/392942046) |

## What reviewers say

### RTA Pro

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

**Currently charting:** #188 Top Paid · Utilities (US App Store)

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


### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.

**Highlights:** Real-time spectrogram visualization, Constant-Q, linear, and mel frequency scales, Full human hearing frequency range, Intuitive touch panning and zooming, Adjustable gain, Q, and other parameters, Pro version: grids, scales, spectrum view, tap-to-measure

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


## Frequently asked questions

### Is RTA Pro free?

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

### Is Spectrolite free?

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

### Which has better reviews, RTA Pro or Spectrolite?

Spectrolite is rated higher. RTA Pro averages 4.5 out of 5 from 2 ratings, while Spectrolite averages 4.8 from 51 ratings.

### Do RTA Pro or Spectrolite have ads?

Neither RTA Pro nor Spectrolite shows ads.

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

RTA Pro ships an update every 3 months, and Spectrolite every 8 months. Most recently, RTA Pro was updated on September 13, 2026 and Spectrolite on September 23, 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.*