WretchUp vs MIDIplay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WretchUp
This app offers a unique audio manipulation experience, allowing users to create sonic mayhem with pitch-shifted delays, filters, and sampling. It's designed for live performance and studio use, enabling musicians and sound enthusiasts to generate wild noises and unique effects.
- Pitch-shifted delay with feedback and filter
- Live performance-oriented controls
- Gesture-based play
- Record vocals and instruments
- Sample and manipulate loops
- Inter-App-Audio and Audiobus support
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An effect instrument anyone can play - sonic anarchy in the palm of your hand. iOS Mars: "Barely controlled chaos“, "sonic extremes“, "well suited for live use“ Music App Blog: "if you like the occasional dose of sonic mayhem, then this is an app that will let you make it" WretchUp is the sonic instrument from the imagination of Mouse on Mars Instruments. Used by the duo in their live performances, it's a playable effect inspired by analog hardware. Sing into it, speak into it, plug in an instrument, sample sounds, and then make sonic mayhem. It's been tested in Mouse on Mars' live shows and used in studio albums. But now it's available to anyone - whether you're a musician wanting to create unique sounds or you just want to make some wild noises and frighten friends and enemies. // FEATURES - Pitch-shifted delay with feedback and filter - Unique controls, designed to be used in live performance and tested onstage - Play with gestures, even without looking closely at the screen - Record vocals or instruments from the built-in mic or another input - Sample loops and change their speed - Adjust the feedback loop, pitch, and filter for unique sounds - Make inputs by holding down your finger, or lock input for continuous sampling - Inter-App-Audio supported - Audiobus supported www.mouseonmars.com/mominstruments Features artwork by Rupert Smyth. Pure Data-based, open source patch created by Florian Grote and Peter Kirn with Mouse on Mars. App design by Oliver Greschke. Powered by free and open source software libpd. Note: like all mic-based effects, you need to enable microphone input. If you accidentally did not allow mic input, you can allow later via: Device settings, WretchUp, Data settings, Microphone, allow mic input.
MIDIplay
This application allows users to play MIDI files with multiple tracks and channels, offering selective control. It features a built-in FM synth and a sound space surface controller, with sliders for tempo and pitch adjustment.
- MIDI file playback
- Multi-track and channel control
- Built-in FM synth
- Sound space surface controller
- Tempo and pitch sliders
- Transposition +/- 6 semi-tones
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An app designed for Audiobus 3 that can also be used stand-alone with a cool built-in FM synth and sound space surface controller. MIDI files can contain multiple tracks and channels, which can be selectively turned on/off. Sliders control tempo and pitch (can be transposed +/- 6 semi-tones). https://www.youtube.com/watch?v=GMm4BkcL28I
Screenshots
Verdict
The clearest difference is review sentiment: WretchUp at 91% against MIDIplay's 33%. WretchUp also leads on rating (3.1 vs 2.3) and update cadence (every 3 weeks vs every 2 months). MIDIplay's advantage is price ($1.99 vs $4.99). On ads, in-app purchases, monetization model and device support 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
WretchUp costs $4.99 and MIDIplay $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WretchUp holds the better App Store score, 3.1 against 2.3. Both are backed by a comparable volume of ratings — 9 and 3 respectively. Written reviews point the same way: 91% of WretchUp's written reviews are positive against 33% of MIDIplay's.
WretchUp ships an update every 3 weeks, MIDIplay every 2 months. The most recent releases landed on October 3, 2026 and September 29, 2026 respectively.
| Parameter | WretchUp | MIDIplay |
|---|---|---|
| Price | $4.99 | $1.99 — better |
| Rating | 3.1 (9 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 90.9% of reviews — better | 33.3% of reviews |
| Number of ratings | 9 — better | 3 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 15 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | MoMinstruments GbR | Mark Carlotto |
Customer experience
WretchUp
MIDIplay
In-app purchases
WretchUp
No in-app purchases
MIDIplay
No in-app purchases
