KeyTempo vs PatchMap
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
KeyTempo
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A music player that lets you independently adjust pitch and tempo in real time. Key Features - Pitch control: -12 to +12 semitones (keeps original speed) - Tempo control: 50% to 150% (keeps original pitch) - A-B repeat: Loop any section for focused practice - Export: Save adjusted audio as a new file Perfect for - Musicians practicing at slower speeds - Singers adjusting song keys - Students repeating difficult sections - Language learners slowing down audio Why KeyTempo? - No ads - Focus on your practice - Intuitive UI - No complicated settings - Real-time control - Change pitch/tempo without interruption - Works offline - No internet needed - No sign-up required - Install and start using immediately Supports MP3, M4A, WAV, FLAC, AAC and more.
PatchMap
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PatchMap is the fast, structured way for Eurorack players to document, search, and recreate their patches. Stop relying on blurry phone photos and scattered notes β capture every connection in seconds and find any patch later. Fast Patch Recording Pick a module, mark an output and an input, and save the connection. Logging a full patch takes seconds, not minutes, so you can document a great sound before it slips away. Your Module Library Build a library of your rack's modules once and reuse it for every patch. Add modules with their HP, type, and I/O so your records stay accurate and consistent. Powerful Search Search your entire patch history by module name, tag, or date. The good patch you made last month is always one tap away. Signal Flow Visualization See each patch as a clean connection diagram β modules laid out with color-coded cables β so you can understand the routing at a glance and recreate it exactly. Tags & Notes Organize patches with tags like ambient, percussion, or drone, and add text notes to capture settings, knob positions, and ideas. Shareable Patch Cards Generate a clean patch card image and share it to Instagram, Reddit, or with friends in one tap. Privacy First PatchMap works completely offline. No account, no cloud, no data collection. Everything stays on your device. Built for modular synth players with mid-to-large systems who patch often and want to remember every great sound.
Screenshots
Verdict
KeyTempo and PatchMap are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | KeyTempo | PatchMap |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | β |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 16.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | DONG CHEOL HAN | ζ ι |
In-app purchases
KeyTempo
No in-app purchases
PatchMap
No in-app purchases





