Accorduon

Foldable Accordion

An accordion for iPhone. On iPhone Duo the hinge is the bellows: fold and unfold to play.

Download on the App Store
  • iPhone
  • Made for iPhone Duo
  • Free, one-time Pro
  • No ads
  • 7 languages
Accorduon on a slightly folded iPhone Duo: piano keys on the left, bass buttons on the right, the bellows on the fold

Your foldable is an accordion

Hold iPhone Duo open like a book: the keyboard under your left thumb, bass buttons under your right, and the hinge between them is the bellows. Fold and unfold to push air through the reeds. The faster you move, the louder and brighter it plays.

Accorduon on an unfolded iPhone Duo, playing Ode to Joy

No foldable? Rock to play

On any iPhone, or iPhone Duo folded shut, turn it sideways and rock it like a steering wheel to work the bellows. Or turn on Auto Air to keep them full.

Accorduon on a regular iPhone held sideways and tilted

Reeds, not samples

Every note is synthesized as you play: three musette reeds beating against each other, a bassoon reed below, the wooden chamber and the hiss of air. Flip the register switches like on a real accordion: Master, Clarinet, Bassoon, Bandoneon, Violin and Musette.

The six register switches above Accorduon on a slightly folded iPhone Duo, Musette on

Learn a song

Pick a melody and the next key lights up: Ode to Joy, Jingle Bells, Korobeiniki, Amazing Grace and more. Chords wait on the right: F, C, G, Dm, Am and Em.

Accorduon in dark mode on an unfolded iPhone Duo, the next note of Ode to Joy lit up

Accorduon Pro

No ads, ever. One purchase, no subscription: every register, the whole song library, and future Pro features at no extra cost.