Foldeon: Diatonic Accordion
Foldeon: Diatonic Accordion is made and published by Ilia Filiaev. AppBrain is an independent app data site and isn't affiliated with Ilia Filiaev. The app name, icon, screenshots and description belong to Ilia Filiaev and are shown as published on the App Store.
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- Last updated
- November 1, 2026
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Releases
Updates seen on the App Store- Version
- 1.0
- Launched
- November 2026
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 12.2 MB
- Content rating
- Everyone
Technologies used by Foldeon: Diatonic Accordion
About the app and developer
About Foldeon: Diatonic Accordion
Foldeon: Diatonic Accordion is a music app developed by Ilia Filiaev.
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App Information
Foldeon: Diatonic Accordion is freely available from the App Store. The app size is 12.16 MB. The latest version available is 1.0. The last update was on November 1, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since November 2026.
Developer information for Ilia Filiaev
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Store listing
By Ilia Filiaev, from the App Store
Description by Ilia Filiaev Written by the developer, not by AppBrain. Click to read.
Unfold the phone and fold it again: the air moves and the reeds sing. Stop, and the sound stops, just like a real squeezebox. And like every diatonic accordion, opening and closing play different notes on the same key, so a scale runs back and forth with the bellows.
On any other iPhone, tilt the phone toward you and away to work the bellows, or drag the bellows on screen.
WHAT MAKES IT FEEL REAL
• Bellows pressure sets loudness and tone together: a gentle push is soft and dark, a firm one bright and full.
• Free-reed sound with the breath of the valves, synthesized on your iPhone — no recorded samples.
• Push and pull notes on every key, laid out like the real instruments.
• Calibrated to you: a short warm-up learns how you move and how still your phone's sensor is.
INSTRUMENTS
• Easy Accordion in G — free: eight big keys and four basses, two octaves of G major.
• With Pro: Cajun Accordion in C, Melodeon D/G, Two-Row G/C, Norteño G/C/F with 38 keys, and the 20-key Anglo Concertina C/G.
REGISTERS
Clarinet and Violin are free. Pro adds Bassoon, Bandoneón, Musette and Master.
SHARE YOUR PLAYING
Record up to a minute and Foldeon makes a vertical video with the bellows moving the way you played — ready for TikTok, Reels and Shorts. Free videos carry a small "Played on Foldeon" mark; Pro removes it.
NOTE NAMES YOUR WAY
C D E, Do Re Mi, or the German H.
FOLDEON PRO
One purchase, no subscription: five more instruments, four more registers, and videos without the watermark.
PRIVATE BY DESIGN
No account, no ads, no tracking. Your recordings stay on your iPhone until you share them. Foldeon never uses the microphone.