AUMI vs Circular Bells
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.
Circular Bells
Explore a vibrant, interactive musical interface inspired by Montessori principles. Arrange and play with colorful bells to create melodies and enjoy a relaxing, visually engaging experience.
- Interactive bell interface
- Customizable layouts
- Uplifting sounds
- Floating animation
- Montessori-inspired design
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Circular Bells is a music app that lets you sit back and relax while you play with its brightly-coloured, ever-changing interface, and uplifting sounds. Move the bells around, create your own layouts, and then hit the button that makes everything float around. Chase the bells, and play your favourite tunes! This app is inspired by the Montessori bells, and by the work of Jeanne Bamberger. Bamberger, J., & Schön, D. A. (1983). Learning as Reflective Conversation with Materials: Notes from Work in Progress. Art Education, 36(2), 68–73. http://doi.org/10.2307/3192667
Screenshots
Verdict
AUMI and Circular Bells both sit at 5.0 stars, but that hides the real split: 100% of Circular Bells's written reviews are positive against 50% of AUMI's. AUMI's advantage is in-app purchases (none 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. Circular Bells sells 1 one-off in-app purchase. AUMI asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for AUMI against 5.0 for Circular Bells. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews are what separate them: 50% of AUMI's written reviews are positive against 100% of Circular Bells's.
AUMI ships an update every 6 months, Circular Bells every 5 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | AUMI | Circular Bells |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (2 ratings) |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 — better | 2 |
| Update frequency | Every 6 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 69 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Rensselaer Polytechnic Institute | Andrea Franceschini |
Customer experience
AUMI
Circular Bells
In-app purchases
AUMI
No in-app purchases
Circular Bells
- Remove ads$1.99









