RackDocs vs M8 Music Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RackDocs
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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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 © their respective manufacturers. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
M8 Music Tracker
Create and arrange music with a portable eight-track tracker, synthesizer, and sequencer. Features multiple synth engines, sample playback, and advanced sequencing tools. Offers extensive connectivity and compatibility with hardware and other M8 users.
- Eight-track music tracker and sequencer
- Multiple built-in synth engines (Wavsynth, Macrosynth, FMSynth, Hypersynth)
- Sampler for playback and recording
- Advanced sequencing with modulation, scales, and effects
- MIDI instrument control
- CoreMIDI and IAA integration
- Portrait and landscape support
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M8 tracker is an eight-track music tracker, sequencer, and synthesizer from Dirtywave. Create and arrange music using a portable tracker workflow. Sequences are built from phrases and chains, which can be arranged independently across eight tracks with sequencing and modulation at each step. Instruments • Wavsynth - Chip synth inspired wavetable synth • Macrosynth - Macro oscillators of over 40 unique synthesis engines • FMSynth - Four-operator FM synthesis • Hypersynth - Six-note 13 oscillator swarm synth • Sampler - Sample playback and recording • MIDI instruments for controlling internal or external gear • Up to 128 instruments per song Sequencing • Eight independent monophonic tracks • Instrument tables for advanced modulation • Scales, grooves, probability, and comprehensive effect commands • Live performance and song-rendering tools Connectivity • CoreMIDI input and output • External computer keyboards and game controllers • Ableton Link support • AUv3 plugin version • Inter-App Audio (IAA) integration • Launchpad Pro MKIII support M8 supports portrait and landscape orientations on iPhone and iPad. Projects, instruments, samples, themes, and rendered audio are accessible through the Files app. Built-in contextual help explains every view with shortcuts. M8 for iOS provides the complete M8 workflow in a portable, touch-enabled interface. Songs and bundles are fully compatible with M8 hardware and can be transferred between devices and shared with other M8 users. Join the Dirtywave Discord community to share music, get help, and discuss M8.
Screenshots
Verdict
The clearest difference is price: RackDocs at Free against M8 Music Tracker's $29.99. M8 Music Tracker's advantage is in-app purchases (none vs 4) and ratings volume (97 vs 4). On rating, review sentiment, update cadence and ads 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
RackDocs is free to download; M8 Music Tracker costs $29.99 up front. RackDocs sells 4 in-app purchases, starting at $0.99 per month. M8 Music Tracker asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for RackDocs against 5.0 for M8 Music Tracker. That said, the two scores are not equally well evidenced: M8 Music Tracker has 97 ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
RackDocs ships an update every 6 days, M8 Music Tracker every 4 days. The most recent releases landed on October 12, 2026 and October 18, 2026 respectively.
| Parameter | RackDocs | M8 Music Tracker |
|---|---|---|
| Price | Free — better | $29.99 |
| Rating | 5.0 (4 ratings) | 5.0 (97 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 | 97 — better |
| Update frequency | Every 6 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Best chart rank | — | #15 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 235 MB |
| Age rating | 4+ | 4+ |
| Developer | TheMM | Dirtywave |
Customer experience
RackDocs
M8 Music Tracker
In-app purchases
RackDocs
- Monthly Subscription$0.991 Month
- Yearly Subscription$3.991 Year
- Yearly Supporter$8.991 Year
- Lifetime Access$44.99
M8 Music Tracker
No in-app purchases








