ETC Library vs RMS Mix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ETC Library
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.
- 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
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ETC Library gives you quick and easy access to ETC’s technical documentation. This virtual binder lets you view, share datasheets, application sheets, brochures and more for all of ETC’s products – anytime, anywhere. Key features • Access to hundreds of documents, including all ETC datasheets • Material organized by product family and category for easy browsing • Share documents easily (Please note: This application intended to deliver basic technical information about ETC’s products and product families. If you are searching for more information than what is provided in this app, please visit www.etcconnect.com.)
RMS Mix
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.
- 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
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This app is to be used in conjunction with live theatre resources offered through Realtime Music Solutions - including: * Sinfonia (OrchExtra, InstrumentalEase) * RMS Coach (AccompanEase) * RMS Mix With this app, you can take content developed and edited with any of the above on the go, on your iPhone or iPad. Features include: * High quality multitrack audio, up to 16 channels, 8 stereo tracks. * Intuitive mix controls. * Convenient part organization and separation, allows you to focus on what you need. * Arbitrary vamp control. * Bar by bar music navigation. * Customizable reverb engine. * Unlimited downloads of all show files associated with your production. If you've been using these resources for years, you now have an amazing and powerful new extension to the capabilities! If you're new to these technologies, you've got a new reason to give it a try! Check out why so many theaters and schools around the world won't do a show without them!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ETC Library | RMS Mix |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) | 4.5 (8 ratings) — better |
| Positive reviews | 0.0% of reviews | 54.5% of reviews — better |
| Number of ratings | 4 | 8 — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17 | 13.0 — better |
| Further details — not scored | ||
| Size | 71 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Electronic Theatre Controls, Inc. | Realtime Music Solutions, LLC |
Customer experience
ETC Library
RMS Mix
In-app purchases
ETC Library
No in-app purchases
RMS Mix
No in-app purchases








