Theremin I/O
Theremin I/O is #155 in Music Paid in Italy and charting in 1 of 24 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperFFFF00 Agents AB
CategoryMusic
Price2.99 EUR
Released
Rating★ 5.0 (1)
Version1.3
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026Installs (est.)500+ worldwide
Rating
5.0 ★
1 ratings
Measured
Best rank now
#155
Music PaidMeasured
Theremin I/O on the App Store
App details
App ID
669456913
Publisher
FFFF00 Agents AB
Content rating
4+
Theremin I/O downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| Italy | MusicPaid | #155 |
Apps near Theremin I/O on the chart
Music Paid, around #155.
Ratings
App Store, worldwide.
Rating
5.0 ★
1 ratings
Measured
Ratings
1
Measured
About Theremin I/O
Play with light – Theremin I/O turns your iPhone into a touchless music instrument. It uses your camera and flash to measure the distance to your hand, this signal is then processed by a synthesizer to generate a tone.
Features:
• Old-school synthesizer
• Constrain input to scales (harmony quantization)
• 8 sound presets with effect controls
• 50+ scale presets
• Use as a MIDI controller (requires in-app purchase)
• Learn fast with the tutorial overlay
For more information visit http://theremin.io
Features:
• Old-school synthesizer
• Constrain input to scales (harmony quantization)
• 8 sound presets with effect controls
• 50+ scale presets
• Use as a MIDI controller (requires in-app purchase)
• Learn fast with the tutorial overlay
For more information visit http://theremin.io
Latest updates
1.3
* Updated for iOS 11
* Network MIDI is now free!
