# RT60 vs DELA USB

The clearest difference is review sentiment: RT60 at 67% against DELA USB's 18%. RT60 also leads on ratings volume (5 vs 1) and device support (3 vs 1). DELA USB's advantage is price (Free vs $34.99) and rating (4.0 vs 3.4). On ads and in-app purchases there is nothing between them.

DELA USB is free to download; RT60 costs $34.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DELA USB holds the better App Store score, 4.0 against 3.4. That said, the two scores are not equally well evidenced: RT60 has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 67% of RT60's written reviews are positive against 18% of DELA USB's, so the app with the better star average is not the one people write more warmly about.

RT60 ships an update every 6 months, DELA USB every 3 months. The most recent releases landed on September 21, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | RT60 | DELA USB |
| --- | --- | --- |
| Price | $34.99 | **Free** |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/rt60/id298840320/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/dela-usb-dac-player/id1438720535/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | **66.7% of reviews** | 17.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 27 MB | 65 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [DELA Inc.](https://appshunter.io/developer/1438720534) |

## What reviewers say

### RT60

[App page](https://appshunter.io/ios/app/rt60/id298840320)

This tool measures reverb decay time across octave bands using pink noise. It conforms to ISO 3382 standards for room acoustics and can display results from 50ms to 4 seconds. Save measurement graphs for reports.

**Highlights:** Measures reverb decay time, Octave band analysis (63Hz - 4kHz), Conforms to ISO 3382 standard, T20 and T30 measurement methods, Adjustable decay time range (50ms - 4s), Save measurement graphs, Microphone calibration

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

**In-app purchases:** none


### DELA USB

[App page](https://appshunter.io/ios/app/dela-usb-dac-player/id1438720535)

Control and play music from your music library, iPad, or streaming services. Supports playback through connected USB audio devices and internet radio. Optimized for iPad horizontal screen mode.

**Highlights:** Music library playback, USB audio device support, TIDAL/Qobuz streaming, Internet radio playback, Gapless playback (internal drive), iPad playback

**In-app purchases:** none


## Frequently asked questions

### Is RT60 free?

RT60 costs $34.99, with no in-app purchases.

### Is DELA USB free?

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

### Which has better reviews, RT60 or DELA USB?

DELA USB is rated higher. RT60 averages 3.4 out of 5 from 5 ratings, while DELA USB averages 4.0 from 1 ratings.

### Do RT60 or DELA USB have ads?

Neither RT60 nor DELA USB shows ads.

### Which is updated more often, RT60 or DELA USB?

RT60 ships an update every 6 months, and DELA USB every 3 months. Most recently, RT60 was updated on September 21, 2026 and DELA USB on July 18, 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.*