Echo String™ Lite vs AUMI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Echo String™ Lite
Create music easily with this innovative harp app. It features three partitions of strings with chord mask settings, allowing you to glide and produce melodies. Record your performances and play them back at original or dual speed.
- 3 partition strings
- Chord Mask settings
- Record and playback functionality
- Two playback speeds
- Visual effects
- Supports AudioBus and Inter-App Audio
- WiFi MIDI Out & MIDI Out
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Echo String™ is an innovative harp app. with it, you can create wonderful music with more easy and more fun. It has 3 partitions strings (In full version has 7 partitions) with different Chord Mask settings,you can just glide over and create music. (In full version it cant export MIDI file) Features √ 3 partition strings. √ Chord Mask(string mask). √ Cool visual effects. √ Record / Playback. √ Two playback-speed avaliable( original speed or dual speed) √ Supports AudioBus and Inter-App Audio √ Wifi MIDI Out & MIDI Out Instructions 1.Set Chord Mask you want to use for each performance partition. 2.Tap the recored button and start your performance 3.Tap any button(record stop play) to end record. 4.Tap the play-button to playback
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.
Screenshots
Verdict
Echo String™ Lite and AUMI both sit at 5.0 stars, but that hides the real split: 89% of Echo String™ Lite's written reviews are positive against 50% of AUMI's. Echo String™ Lite also leads on iOS requirement (6.1 vs 12.4). AUMI's advantage is device support (3 vs 1). On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 5.0 for Echo String™ Lite against 5.0 for AUMI. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews are what separate them: 89% of Echo String™ Lite's written reviews are positive against 50% of AUMI's.
Echo String™ Lite ships an update every 7 months, AUMI every 6 months. Both last shipped on November 1, 2026.
| Parameter | Echo String™ Lite | AUMI |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (4 ratings) |
| Positive reviews | 88.9% of reviews — better | 50.0% of reviews |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 7 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 6.1 — better | 12.4 |
| Further details — not scored | ||
| Size | 3 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Supertintin Co., Ltd | Rensselaer Polytechnic Institute |
Customer experience
Echo String™ Lite
AUMI
In-app purchases
Echo String™ Lite
No in-app purchases
AUMI
No in-app purchases








