AUMI vs Skoog Skratch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AUMI
This app allows individuals with limited mobility to create music through movement and gestures. It focuses on improvisation and self-expression, making music accessible to a wider range of people, including those with profound physical disabilities.
- Music creation through movement and gestures
- Focus on improvisation and self-expression
- Accessible for individuals with profound physical disabilities
- Uses device cameras for input
- Configurable sound sensitivity
- MIDI controller functionality
- Import audio from other apps
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Adaptive Use Musical Instruments (AUMI) software interface enables people who have very limited controlled (voluntary) movement to independently engage in music making. The Adaptive Use Musical Instruments software interface enables the user to play sounds and musical phrases through movement and gestures. This is an entry to improvisation rather than “hitting the right notes” or playing set pieces of music. Instead, the software uses music as a way for participants to express a range of affects, both by themselves and in response to, or in conversation with, others. While the AUMI interface can be used by anyone, the focus has been on working with people who have profound physical disabilities. In taking these participants as its starting point, the project attempts to make musical improvisation and collaboration accessible to the widest possible range of individuals. This approach also opens up the possibility of learning more about the relations between ability, the body, creativity and improvisation, from within a cultural context that does not always acknowledge or accept people with disabilities. This iOS version of AUMI runs on devices with cameras, and can run on iPhones, iPod touches, and iPads. A large assortment of sounds can be triggered with configurable amounts of sensitivity. AUMI also can be used as a MIDI controller to access other iOS based synthesizers or external equipment (using the iPad's Camera Connection kit or via Core MIDI over WiFi.) AUMI can also import audio from other iOS or desktop apps to be used as melodic or percussive instruments. AUMI can capture a record of the movement in the session, which can be exported and turned into reports in a clinical setting.
Skoog Skratch
Easily create and share music by recording sounds into colored tiles. Tap to play, scratch samples like a DJ, and collaborate with others globally. No prior musical skill is needed to start making great-sounding tracks.
- Record custom audio samples
- DJ-style scratching with samples
- Save and load multiple sample sets
- Import samples via AirDrop/Files
- Play multiple sounds simultaneously
- Share music globally
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Make and share music in seconds. Simply tap to RECORD, PLAY and SHARE with music makers all over the world. If you are new to music making, getting started making great sounding tracks has never been this easy — and sounded so great! Skoog Skratch is a fully VoiceOver accessible sampling app for children, musicians, and everyone in between! Skoog Skratch has five coloured tiles. Record a sound into each one. Tap the tile to play it back. Create an addictive beat when out in the park using the microphone on your iPhone, then Airdrop to your iPad back at home or at school and share with all your friends! FEATURES • Record your own samples with up to five sounds each • Skratch through your samples using your Skoog 2.0 like a DJ • Save and load as many sample sets as you like • Load your own samples into Skratch using Airdrop or from the Files app • Tap a sound to play • Press and hold on a sample to enable auto-trimming and skratch mode • Record and share your jams • Play many sounds at once • Share music with people all over the world • No previous playing skills required • Large buttons for easy use on all devices (iPad, iPod Touch, iPhone) • Connect to Garageband with Inter-App audio to jam along with and record into your Garageband tracks Use on its own or with Skoog 2.0. Connect your Skoog, and use it to play and skratch your own samples recorded straight into the app. Skoog is an easy to play musical instrument that can change the way you and your family can enjoy, create and learn music - no matter what your skills, abilities or musical talents. Skoog 2.0 hardware is available to buy online from Apple and in selected Apple retail stores. www.skoogmusic.com
Screenshots
Verdict
The clearest difference is rating: AUMI at 5.0 against Skoog Skratch's 4.1. Skoog Skratch's advantage is review sentiment (75% vs 50%) and update cadence (every 5 weeks vs every 6 months). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AUMI holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews complicate that: 50% of AUMI's written reviews are positive against 75% of Skoog Skratch's, so the app with the better star average is not the one people write more warmly about.
AUMI ships an update every 6 months, Skoog Skratch every 5 weeks. The most recent releases landed on September 25, 2026 and October 20, 2026 respectively.
| Parameter | AUMI | Skoog Skratch |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | 4.1 (9 ratings) |
| Positive reviews | 50.0% of reviews | 75.0% of reviews — better |
| Number of ratings | 4 | 9 — better |
| Update frequency | Every 6 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 69 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Rensselaer Polytechnic Institute | Playable Tech ltd. |
Customer experience
AUMI
Skoog Skratch
In-app purchases
AUMI
No in-app purchases
Skoog Skratch
No in-app purchases








