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Accorduon: Foldable Accordion icon
Built for Duo

Accorduon: Foldable Accordion

Play a synthesized accordion with melody keys, bass chords and guided songs.

Artem Novichkov · Music & Audio · Free

View on the App StoreSave

iPhone screenshots

Accorduon: Foldable Accordion — iPhone screenshots 1
Accorduon: Foldable Accordion — iPhone screenshots 2

How it uses iPhone Duo

Hold Duo like a book with bass and melody controls on opposite halves. Move the hinge like bellows. Faster movement makes the reeds louder and brighter.

What’s New

Version 1.0.1 ·

iOS 26 joins the band! Accorduon now plays on more iPhones, with smoother melodies and a little extra polish.

App Store descriptionWritten by the developer.

Accorduon turns iPhone Duo into an accordion: the hinge is the bellows. Fold and unfold to play. No foldable? Rock any iPhone like a steering wheel. YOUR FOLDABLE IS AN ACCORDION Hold iPhone Duo open like a book: keys under your left thumb, bass buttons under your right, and the hinge between them pushes air through the reeds. The faster you move, the louder and brighter it plays. NO FOLDABLE? ROCK TO PLAY On any iPhone, turn it sideways and rock it like a steering wheel to work the bellows. Or drag the bellows with a finger, or turn on Auto Air to keep them full. 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. SIX REGISTERS Flip the switches like on a real accordion: Master, Clarinet, Bassoon, Bandoneon, Violin and Musette. 9 SONGS TO PLAY ALONG Follow the notes key by key: Ode to Joy, Twinkle, Twinkle and Happy Birthday, plus six more with Pro: Jingle Bells, Frère Jacques, When the Saints, Oh! Susanna, Amazing Grace, Korobeiniki. MAKE IT YOURS Keys on the left or right, note names, haptics. ACCORDUON PRO One purchase, no subscription: Bassoon, Bandoneon, Violin and Musette registers, the whole song library, and future Pro features at no extra cost. No ads, with or without Pro.

Accorduon: Foldable Accordion on iPhone Duo: FAQ

Is Accorduon: Foldable Accordion optimized for iPhone Duo?

Yes. Accorduon: Foldable Accordion is Built for Duo: it uses the fold, Split View or the outer display. Verified on November 4, 2026 (Developer statement).

What does Accorduon: Foldable Accordion look like on iPhone Duo?

Hold Duo like a book with bass and melody controls on opposite halves. Move the hinge like bellows. Faster movement makes the reeds louder and brighter.

How much does Accorduon: Foldable Accordion cost?

Accorduon: Foldable Accordion is free to download on the App Store.

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