RackDocs - Eurorack Reference

RackDocs - Eurorack Reference

Document Your Modular Synth

4 ratings
3 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 30, 2025
  • April 19, 2026

Features

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About

Document your modular synthesizer modules with photos and detailed notes. Capture every switch position, LED behavior, and hidden feature. Sync across devices and access your documentation offline.

Photo-based module documentation
AI annotation extraction from manuals
Multi-context documentation
LED behavior tracking
Switch position guides
Community library of documented modules
Offline access and iCloud sync
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What's New in RackDocs

1.7.2

April 19, 2026

Made small improvements and fixed bugs to help the app run smoother and more reliably.

Subscription plans

Monthly Subscription

Try unlimited access for a month

$0.991 Month
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In-App Purchases

$44.99

Lifetime Access

Pay once, own forever, all future updates free

User reviews

Good helper

But 50€ is way too much even though it’s a good app.

Response from developer

Therefore I offer way cheaper subscriptions.

Awesome Learning Tool

A must-have for any modular synth hobbyist or pro. Having a cheat-sheet at your fingertips for your modules is a convenience that is hard to do without now, and sharing my own to the community library has helped me immensely in learning what my modules are capable of.

Response from developer

It means a lot to hear that RackDocs has become such a useful learning tool in your modular journey. I’m especially glad the community library and sharing your own cheat-sheets have helped you get more out of your modules—that’s exactly what I hoped this app could do. I’ll keep working to make it an even better companion for both hobbyists and pros alike.

Just what the Doctor ordered

This App has made a huge impact on my Eurorack experience. Very well put together. So easy to use, intuitive, and thorough. Only thing that could make it better is the ability to sort your library by function.

I use it to learn modules (what better way than writing down what everything does in an organized fashion). Sure, it’s a little bit of work, but I find it highly rewarding. And there’s an ever growing selection of modules submitted by users who are obviously committed to detail. I also find it essential as reference when my memory fails - which happens more frequently as I acquire more modules and I get older.

Highly recommended.
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Response from developer

I really appreciate your point about using the app to learn modules by writing everything down in an organized way—that’s exactly the kind of deep engagement I hoped the app would encourage. It is some work, but I’m glad to hear you find it rewarding and helpful, especially as a reference as your system grows. Your suggestion about sorting your library by function is a great one. It’s already on my radar, and feedback like yours helps me prioritize improvements so I can make RackDocs even more useful for you and the rest of the community.

Developer apps

FAQ

What is RackDocs?

RackDocs is a mobile application designed to help users document their modular synthesizer modules. It allows you to take photos of your modules and add detailed annotations for every control, switch, and LED.

What types of modular synths does RackDocs support?

RackDocs supports a wide range of modular formats including Eurorack, 1U, 5U/MU, Serge, and Buchla, among others.

Can I use RackDocs without an internet connection?

Yes, RackDocs offers full offline mode, allowing you to access and update your documentation even when you don't have Wi-Fi. Your data is stored locally and can be synced later.

How does the community library work in RackDocs?

The community library allows users to share their documented modules and download documentation created by others. You can vote on documentation, and verified accounts help prevent random chaos.

What are the pricing options for RackDocs?

RackDocs offers a free tier with limitations on modules, downloads, and exports. Paid options include monthly, yearly, and lifetime subscriptions, with the Yearly Supporter tier locking in your price.

Does RackDocs have ads?

RackDocs does not contain advertisements. The app is free to start with optional in-app purchases for advanced features and increased limits.

How often is RackDocs updated?

The latest version of RackDocs is 1.7.1, last updated on March 3, 2026. Updates typically include new features, bug fixes, and performance improvements.

Can I export my RackDocs documentation?

Yes, you can export your cheat sheets as PDFs or images. This allows you to print them, share them, or use them for reference outside the app.