About RackDocs - Eurorack Reference
Remember When You Knew What Everything Did? You know the feeling. You're three hours deep into a patch on your Eurorack (or Buchla, or Serge, or 5U rig), riding that creative flow, when you can't remember if that switch...
Remember When You Knew What Everything Did? You know the feeling. You're three hours deep into a patch on your Eurorack (or Buchla, or Serge, or 5U rig), riding that creative flow, when you can't remember if that switch toggles the quantizer or unlocks some hidden LFO mode you discovered last month at 2 AM. Or worse, you finally saved up for that complex module everyone raves about. The manual is 87 pages of dense tables. There's a switch upper left. And three knobs. A mysterious LED that blinks in morse code. You patch something, it sounds incredible... then forget how you got there. RackDocs was born from exactly these moments. Built by someone staring at their rack, trying to remember what switch position enables through-zero FM. YOUR RACK, ACTUALLY DOCUMENTED Forget dusty manuals and half-remembered forum posts. Take a photo of your module, mark it up with everything you discover, build your own personal wiki. Every hidden feature. Every switch position. Documentation on your terms. Works with Eurorack, 1U, 5U/MU, Serge, Buchla, and more. BUILT FOR EXPLORATION . NEW: AI annotation extraction-point at a manual or PDF, get all controls identified automatically . Photo-based-faceplates are already the perfect reference . Auto-snap to controls (tap near a jack or knob, circles detected automatically) . Smart image editing (crop that cluttered desk out) . Import specs from ModularGrid (why type HP and mA manually?) . Multi-format support (3U, 1U, 5U, Serge, Buchla-we don't discriminate) . Annotation tools that make sense DOCUMENT EVERYTHING YOU DISCOVER . 12 annotation types for every control (not just "knob goes brr") . Multi-context documentation (Normal Mode vs. Secret Alt Firmware Mode) . LED behavior tracking (solid/blinking/pulsing/existential crisis) . Switch position guides (up = quantized, down = chaos, center = ???) . Multi-step operation notes (tap this while holding that) . Copy/paste annotations CURATED NEWS FEED . Eurorack news, videos, and new module releases - all in one place COMMUNITY LIBRARY . Many modules documented by fellow patch nerds . Share your discoveries . Vote on documentation (yay or meh) . Verified accounts prevent random chaos SYNC EVERYWHERE, WORK OFFLINE . iCloud sync across iPhone, iPad, and Mac (patching happens everywhere) . Full offline mode (studio has no WiFi anyway) . Your data stays yours (unless you decide different) ORGANIZE THE BEAUTIFUL CHAOS . Search by name, manufacturer, or custom tags . Sort however your brain works . Export cheat sheets as PDFs or images (print them, share them, flex on Instagram) PRICING Start free with 5 modules, 5 community downloads and 5 exports. Try it, see if it fits your workflow. If you like it: . Monthly - No commitment. Cancel anytime. . Yearly - Best value. Less than a patch cable. . Yearly Supporter - Locks your price forever. New features, same rate. For those who hate price increases. Supporter badge! . Lifetime - Pay once, own forever. No subscriptions, no renewals. Support indie development, not investors. Why subscriptions? Servers cost money. Development costs time. This keeps the lights on and lets me build what you need. WHO MADE THIS? A modular enthusiast tired of scribbling notes at 3 AM. Someone who's bought complex modules, discovered secrets over weeks, then forgot everything after a creative break. PERFECT FOR: . Beginners drowning in manuals and tutorials . Live performers needing instant reference (no PDFs on stage) . Collectors managing systems too big to memorize . Gear heads who RTFM and want to share knowledge . Anyone who's thought "this module did something cool last week" Download RackDocs. Document your discoveries. Patch with confidence. Your rack is unique. Your documentation should be too. Screenshots show the app documenting third-party hardware. Module designs (c) their respective manufacturers. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Version History Made small improvements and fixed bugs to help the app run smoother and more reliably. 1.7.2 Apr 19 - Fixed the "iCloud sync error" banner appearing on every app launch even when iCloud is working fine - Sorry for that! - Fixed downloaded community modules appearing as duplicates in your library - Previously downloaded modules now show a checkmark in the community browser instead of a download button 1.7.1 Mar 3 Stay up to date with the Eurorack world - right inside RackDocs. A new News tab brings you the latest videos, articles, and new module announcements from more than 50 curated sources, all in one place. Free for all users, no subscription required. - Browse the latest from your favorite Eurorack YouTubers, synth news sites, and manufacturer channels - New module listings from ModularGrid appear in your feed as soon as they're added - often before official announcements - Read articles from Synthtopia and Create Digital Music alongside your video content - Filter by Videos, Articles, or New Modules to find exactly what you're looking for - Content is ranked by relevance to the Eurorack world, so the most important news rises to the top - Tap any card to open the original content in your browser - Optimised iCloud syncing and added sync error detection - a subtle banner now alerts you when sync fails (e.g., iCloud storage full or not signed in), so issues no longer go unnoticed 1.7 Feb 27 AI-Powered Annotation Extraction The biggest time-saver since auto-snap: instead of adding annotations one by one, you can now point RackDocs at a module's manual and let AI do most of the work. - Tap the new sparkles button in edit mode, paste a manual URL or open a PDF, and the AI will identify all knobs, jacks, switches, buttons, LEDs, and other controls - Each annotation comes with its label, a description, and type-specific properties like switch positions, LED colors, and signal functions - Review the results, remove anything you don't need, then add them all at once - Annotations are placed in a grid at the bottom of your faceplate — just tap to review, then long-press and drag each one into position - Works best with detailed manufacturer manuals that describe every control Usage Limits by Tier - Free: 2 extractions - Monthly: 3 per month - Yearly: 5 per month - Yearly Supporter: 10 per month - Lifetime: 150 per year 1.6 Feb 11 Resolved an issue that caused some older community modules to fail downloading. If you use modules that were uploaded before combination sorting was introduced, they will now download and install reliably again. 1.5.6 Jan 6 Combinations Export - Cheat sheet exports now include an optional "Combinations Page" at the end - Lists all combinations with their ordered elements and descriptions - Context-specific combinations show their context name in brackets - Automatically switches to a two-column layout with smaller fonts when many combinations need to fit - Toggle available in export options (enabled by default when combinations exist) 1.5.5 Jan 2 Offline Stability - Fixed an issue where the app could become unresponsive when launching without a network connection - App now initializes from cached data when offline, syncing in the background once connection is restored iPad & Mac Experience Overhaul - iPad landscape now shows a proper sidebar navigation instead of a bottom tab bar - Mac (Designed for iPad) gets the same modern sidebar experience - Optimized grid layouts for larger screens: iPad Pro 12.9" now shows up to 6 columns - Community library grid now adapts to screen size like the module library does - All edit dialogs and sheets now display at a comfortable size on iPad and Mac - Unified navigation architecture across all platforms for consistent behavior 1.5.1 12/26/2025 Auto-Snap to Circles: - New annotations automatically snap to nearby jacks, knobs, and buttons using intelligent circle detection - Annotation size adjusts to match the detected control - Toggle on/off via the target icon in the edit toolbar, or in Settings → Editing - Enabled by default, you are welcome :-) Other Improvements: - Added file picker support on Mac: Click the image drop zone or drag & drop images directly from Finder - Camera button now only appears when a camera is available (hidden on Macs without cameras) - Improved image import workflow for "Designed for iPad" on Apple Silicon Macs - Added text at the bottom of the 50 modules limit of the community library, with a hint to use the search function to find what you are looking for 1.5 12/17/2025 - Added unsaved changes warning when exiting edit mode to prevent accidental loss of annotation modifications. - Added local edit tracking for community-downloaded modules to enable safer update workflow and later prevent accidental data loss. This is not tracking edits you did before this app version. Please make a small edit to modules you want to mark as changed. - Some old code prevented that you delete the last context of a module. This is now possible again. - Combinations can now be rearranged in the "manage" list. No more random order by time of creation. - Added a "Rate RackDocs" link in the "Help & Support" section of the settings. Would be happy if you people use it to drop some nice comments and good ratings. This can really make the difference for a solo developer like me. Thank you! 1.4.1 11/18/2025 Updated all icon designs for improved visual clarity. Three New Annotation Types: - Added Card Slot annotation for SD cards and sample storage slots - Added Fader annotation for linear slide controls with optional LED illumination support - Added Joystick annotation with 9-position state documentation (Left, Right, Up, Down, Left-Up, Left-Down, Right-Up, Right-Down, Center) Enhanced Knob Documentation: - Added "Encoder Type" checkbox to mark rotary encoders with push functionality - Encoders display with a distinct icon and are labeled as "Encoder" instead of "Knob" throughout the app 1.4 11/14/2025 RackDocs 1.3.1 Added optional title page for multi-page PDF exports (Technical template + All Contexts) for when you want your module docs to look properly professional. Global context exports now show all annotations with default descriptions instead of just globally-marked ones. Cleaned up multi-page PDF layout and improved context-specific description handling. 1.3.1 11/12/2025 Version 1.3 - Cheat Sheet Export arrived. Export beautiful cheat sheets as PDF or images (A4, Instagram-ready formats) with customizable backgrounds, multiple contexts, and QR codes, perfect for printing, sharing, or social media. - Fixed the search. Now modules like "øchd" can be found when typing "ochd". Works for user and community library. - Enhanced the zooming behaviour in module view and edit mode. - Added a select/unselect all button next to the context list in the editor. - Fixd the text input fields. You now can add line feeds again. Sorry! - Now supports ModularGrid.net and ModularGrid.com - If you tap on the ModularGrid input button and have a ModularGrid URL in the clipboard, it is automatically entered into the dialog. - Some minor interface tweaks 1.3 11/11/2025 - Added MIDI, Microphone and USB annotation types with configurable MIDI and USB connector types. - Fixed edit toolbar placement. On small screens not all buttons were accessible. Now the toolbar can be swiped left/right for access of all elements. Perfect for more elements in future releases (read on...) - Fixed a problem with the auto sizing description fields. When typing in the middle of the text and resizing occured, the cursor jumped to the end of the text. Fixed. - Added intelligent text cleanup when pasting content into annotation fields. A new setting in Settings → Editing allows you to choose between Off, Moderate (removes mid-sentence line breaks and extra whitespace from PDF manuals), or Aggressive (adds smart quotes and bullet normalization) cleanup levels, with Moderate enabled by default. - Improved tap accuracy for annotations on wide modules with larger touch targets. - Added the option for manufacturers to update their modules from multiple devices, even with different iCloud accounts. 1.2 11/04/2025 - Increased the image quality of the ModularGrid import and changed the way RackDocs is handling modules with huge HP. Images will look better now. - Added copy/paste buttons to the text fields in "Add Context" and "Add Combination" dialogs. - The "Reset Zoom" button now remembers the zoom and pan before resetting. Tapping it again will return to the former position and zoom level. - The community library shows who uploaded a module, and an supporter/lifetime supporter/manufacturer indicator. Yes, we now have manufacturer accounts. Send me a mail if you want one. - Knobs now also support illumination (Erica Synth style) - LED annotations now support some more colors 1.1 11/02/2025 I fixed some minor bugs and UI glitches, cleaned up some iCloud code that was intended to prevent duplicates but did the opposite. And I did some overall optimisation, the whole app should behave even snappier than before. And I eliminated a community upload bug that prevented modules to have different form factors than Eurorack. 1.0.1 11/01/2025 1.0 10/30/2025
Previous Versions
Here you can find the changelog of RackDocs - Eurorack Reference since it was posted on our website on 2026-02-13 17:32:20.
The latest version is 1.7.2 and it was updated on 2026-06-23 05:27:56. See below the changes in each version.
RackDocs - Eurorack Reference version 1.7.2
Updated At: 2026-06-02
Changes: Version History Made small improvements and fixed bugs to help the app run smoother and more reliably. 1.7.2 Apr 19 - Fixed the "iCloud sync error" banner appearing on every app launch even when iCloud is working fine - Sorry for that!
- Fixed downloaded community modules appearing as duplicates in your library
- Previously downloaded modules now show a checkmark in the community browser instead of a download button 1.7.1 Mar 3 Stay up to date with the Eurorack world - right inside RackDocs.
A new News tab brings you the latest videos, articles, and new module announcements from more than 50 curated sources, all in one place. Free for all users, no subscription required.
- Browse the latest from your favorite Eurorack YouTubers, synth news sites, and manufacturer channels
- New module listings from ModularGrid appear in your feed as soon as they're added - often before official announcements
- Read articles from Synthtopia and Create Digital Music alongside your video content
- Filter by Videos, Articles, or New Modules to find exactly what you're looking for
- Content is ranked by relevance to the Eurorack world, so the most important news rises to the top
- Tap any card to open the original content in your browser
- Optimised iCloud syncing and added sync error detection - a subtle banner now alerts you when sync fails (e.g., iCloud storage full or not signed in), so issues no longer go unnoticed 1.7 Feb 27 AI-Powered Annotation Extraction
The biggest time-saver since auto-snap: instead of adding annotations one by one, you can now point RackDocs at a module's manual and let AI do most of the work.
- Tap the new sparkles button in edit mode, paste a manual URL or open a PDF, and the AI will identify all knobs, jacks, switches, buttons, LEDs, and other controls
- Each annotation comes with its label, a description, and type-specific properties like switch positions, LED colors, and signal functions
- Review the results, remove anything you don't need, then add them all at once
- Annotations are placed in a grid at the bottom of your faceplate — just tap to review, then long-press and drag each one into position
- Works best with detailed manufacturer manuals that describe every control
Usage Limits by Tier
- Free: 2 extractions
- Monthly: 3 per month
- Yearly: 5 per month
- Yearly Supporter: 10 per month
- Lifetime: 150 per year 1.6 Feb 11 Resolved an issue that caused some older community modules to fail downloading.
If you use modules that were uploaded before combination sorting was introduced, they will now download and install reliably again. 1.5.6 Jan 6 Combinations Export
- Cheat sheet exports now include an optional "Combinations Page" at the end
- Lists all combinations with their ordered elements and descriptions
- Context-specific combinations show their context name in brackets
- Automatically switches to a two-column layout with smaller fonts when many combinations need to fit
- Toggle available in export options (enabled by default when combinations exist) 1.5.5 Jan 2 Offline Stability
- Fixed an issue where the app could become unresponsive when launching without a network connection
- App now initializes from cached data when offline, syncing in the background once connection is restored
iPad & Mac Experience Overhaul
- iPad landscape now shows a proper sidebar navigation instead of a bottom tab bar
- Mac (Designed for iPad) gets the same modern sidebar experience
- Optimized grid layouts for larger screens: iPad Pro 12.9" now shows up to 6 columns
- Community library grid now adapts to screen size like the module library does
- All edit dialogs and sheets now display at a comfortable size on iPad and Mac
- Unified navigation architecture across all platforms for consistent behavior 1.5.1 12/26/2025 Auto-Snap to Circles:
- New annotations automatically snap to nearby jacks, knobs, and buttons using intelligent circle detection
- Annotation size adjusts to match the detected control
- Toggle on/off via the target icon in the edit toolbar, or in Settings → Editing
- Enabled by default, you are welcome :-)
Other Improvements:
- Added file picker support on Mac: Click the image drop zone or drag & drop images directly from Finder
- Camera button now only appears when a camera is available (hidden on Macs without cameras)
- Improved image import workflow for "Designed for iPad" on Apple Silicon Macs
- Added text at the bottom of the 50 modules limit of the community library, with a hint to use the search function to find what you are looking for 1.5 12/17/2025 - Added unsaved changes warning when exiting edit mode to prevent accidental loss of annotation modifications.
- Added local edit tracking for community-downloaded modules to enable safer update workflow and later prevent accidental data loss. This is not tracking edits you did before this app version. Please make a small edit to modules you want to mark as changed.
- Some old code prevented that you delete the last context of a module. This is now possible again.
- Combinations can now be rearranged in the "manage" list. No more random order by time of creation.
- Added a "Rate RackDocs" link in the "Help & Support" section of the settings. Would be happy if you people use it to drop some nice comments and good ratings. This can really make the difference for a solo developer like me. Thank you! 1.4.1 11/18/2025 Updated all icon designs for improved visual clarity.
Three New Annotation Types:
- Added Card Slot annotation for SD cards and sample storage slots
- Added Fader annotation for linear slide controls with optional LED illumination support
- Added Joystick annotation with 9-position state documentation (Left, Right, Up, Down, Left-Up, Left-Down, Right-Up, Right-Down, Center)
Enhanced Knob Documentation:
- Added "Encoder Type" checkbox to mark rotary encoders with push functionality
- Encoders display with a distinct icon and are labeled as "Encoder" instead of "Knob" throughout the app 1.4 11/14/2025 RackDocs 1.3.1
Added optional title page for multi-page PDF exports (Technical template + All Contexts) for when you want your module docs to look properly professional. Global context exports now show all annotations with default descriptions instead of just globally-marked ones. Cleaned up multi-page PDF layout and improved context-specific description handling. 1.3.1 11/12/2025 Version 1.3
- Cheat Sheet Export arrived. Export beautiful cheat sheets as PDF or images (A4, Instagram-ready formats) with customizable backgrounds, multiple contexts, and QR codes, perfect for printing, sharing, or social media.
- Fixed the search. Now modules like "øchd" can be found when typing "ochd". Works for user and community library.
- Enhanced the zooming behaviour in module view and edit mode.
- Added a select/unselect all button next to the context list in the editor.
- Fixd the text input fields. You now can add line feeds again. Sorry!
- Now supports ModularGrid.net and ModularGrid.com
- If you tap on the ModularGrid input button and have a ModularGrid URL in the clipboard, it is automatically entered into the dialog.
- Some minor interface tweaks 1.3 11/11/2025 - Added MIDI, Microphone and USB annotation types with configurable MIDI and USB connector types.
- Fixed edit toolbar placement. On small screens not all buttons were accessible. Now the toolbar can be swiped left/right for access of all elements. Perfect for more elements in future releases (read on...)
- Fixed a problem with the auto sizing description fields. When typing in the middle of the text and resizing occured, the cursor jumped to the end of the text. Fixed.
- Added intelligent text cleanup when pasting content into annotation fields. A new setting in Settings → Editing allows you to choose between Off, Moderate (removes mid-sentence line breaks and extra whitespace from PDF manuals), or Aggressive (adds smart quotes and bullet normalization) cleanup levels, with Moderate enabled by default.
- Improved tap accuracy for annotations on wide modules with larger touch targets.
- Added the option for manufacturers to update their modules from multiple devices, even with different iCloud accounts. 1.2 11/04/2025 - Increased the image quality of the ModularGrid import and changed the way RackDocs is handling modules with huge HP. Images will look better now.
- Added copy/paste buttons to the text fields in "Add Context" and "Add Combination" dialogs.
- The "Reset Zoom" button now remembers the zoom and pan before resetting. Tapping it again will return to the former position and zoom level.
- The community library shows who uploaded a module, and an supporter/lifetime supporter/manufacturer indicator. Yes, we now have manufacturer accounts. Send me a mail if you want one.
- Knobs now also support illumination (Erica Synth style)
- LED annotations now support some more colors 1.1 11/02/2025 I fixed some minor bugs and UI glitches, cleaned up some iCloud code that was intended to prevent duplicates but did the opposite. And I did some overall optimisation, the whole app should behave even snappier than before. And I eliminated a community upload bug that prevented modules to have different form factors than Eurorack. 1.0.1 11/01/2025 1.0 10/30/2025
RackDocs - Eurorack Reference version 1.7.1
Updated At: 2026-03-03
Changes: - Fixed the "iCloud sync error" banner appearing on every app launch even when iCloud is working fine - Sorry for that!
- Fixed downloaded community modules appearing as duplicates in your library
- Previously downloaded modules now show a checkmark in the community browser instead of a download button
RackDocs - Eurorack Reference version 1.6
Updated At: 2026-02-11
Changes: AI-Powered Annotation Extraction
The biggest time-saver since auto-snap: instead of adding annotations one by one, you can now point RackDocs at a module's manual and let AI do most of the work.
- Tap the new sparkles button in edit mode, paste a manual URL or open a PDF, and the AI will identify all knobs, jacks, switches, buttons, LEDs, and other controls
- Each annotation comes with its label, a description, and type-specific properties like switch positions, LED colors, and signal functions
- Review the results, remove anything you don't need, then add them all at once
- Annotations are placed in a grid at the bottom of your faceplate — just tap to review, then long-press and drag each one into position
- Works best with detailed manufacturer manuals that describe every control
Usage Limits by Tier
- Free: 2 extractions
- Monthly: 3 per month
- Yearly: 5 per month
- Yearly Supporter: 10 per month
- Lifetime: 150 per year
RackDocs - Eurorack Reference version 1.7
Updated At: 1970-01-01
Changes: Stay up to date with the Eurorack world - right inside RackDocs.
A new News tab brings you the latest videos, articles, and new module announcements from more than 50 curated sources, all in one place. Free for all users, no subscription required.
- Browse the latest from your favorite Eurorack YouTubers, synth news sites, and manufacturer channels
- New module listings from ModularGrid appear in your feed as soon as they're added - often before official announcements
- Read articles from Synthtopia and Create Digital Music alongside your video content
- Filter by Videos, Articles, or New Modules to find exactly what you're looking for
- Content is ranked by relevance to the Eurorack world, so the most important news rises to the top
- Tap any card to open the original content in your browser
- Optimised iCloud syncing and added sync error detection - a subtle banner now alerts you when sync fails (e.g., iCloud storage full or not signed in), so issues no longer go unnoticed
Disclaimer
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