# ETC Library vs RMS Mix

The clearest difference is review sentiment: RMS Mix at 55% against ETC Library's 0%. RMS Mix also leads on rating (4.5 vs 3.8) and update cadence (fortnightly vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RMS Mix holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews point the same way: 0% of ETC Library's written reviews are positive against 55% of RMS Mix's.

ETC Library ships an update every 3 months, RMS Mix fortnightly. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | ETC Library | RMS Mix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/etc-library/id733300518/reviews) | **[4.5 (8 ratings)](https://appshunter.io/ios/app/rms-mix/id982270841/reviews)** |
| Number of ratings | 4 | **8** |
| Positive reviews | 0.0% of reviews | **54.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 71 MB | 71 MB |
| Requires iOS | 17 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Electronic Theatre Controls, Inc.](https://appshunter.io/developer/318210459) | [Realtime Music Solutions, LLC](https://appshunter.io/developer/375050581) |

## What reviewers say

### ETC Library

[App page](https://appshunter.io/ios/app/etc-library/id733300518)

Access technical documentation for a wide range of products. Browse and share datasheets, application sheets, and brochures organized by product family. This virtual binder provides quick access to essential product information.

**Highlights:** Access to hundreds of technical documents, Organized by product family and category, View datasheets, application sheets, and brochures, Easy document sharing, Offline access to downloaded documents

**Features:** Vision Pro support

**In-app purchases:** none


### RMS Mix

[App page](https://appshunter.io/ios/app/rms-mix/id982270841)

This app allows users to access and manage live theatre music resources on their mobile devices. It provides high-quality multitrack audio playback, intuitive mixing controls, and convenient navigation for musical productions.

**Highlights:** High-quality multitrack audio (up to 16 channels), Intuitive mix controls, Convenient part organization, Arbitrary vamp control, Bar-by-bar music navigation, Customizable reverb engine, Unlimited show file downloads

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ETC Library free?

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

### Is RMS Mix free?

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

### Which has better reviews, ETC Library or RMS Mix?

RMS Mix is rated higher. ETC Library averages 3.8 out of 5 from 4 ratings, while RMS Mix averages 4.5 from 8 ratings.

### Do ETC Library or RMS Mix have ads?

Neither ETC Library nor RMS Mix shows ads.

### Which is updated more often, ETC Library or RMS Mix?

ETC Library ships an update every 3 months, and RMS Mix fortnightly. Most recently, ETC Library was updated on November 6, 2026 and RMS Mix on November 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.*