An NES-style step sequencer: the grid on one side of the fold, the keys on the other
Does Chiptune work on iPhone Duo?
Yes, since version 1.3.1, and seen in iPhone Duo simulator screenshots: open and sideways, the grid sits on one side of the fold and the sound controls and keys on the other.
- Simulator verifiedIndividuation Labs, the developer, in a submission to FoldHunt on October 27, 2026, and on the Chiptune website, with App Store screenshots from the iPhone Duo simulator. The App Store seller is Individuation Labs LLC. The release notes for version 1.3.1 (released October 24, 2026) say Chiptune now fits iPhone Duo.
Adapted for the fold
- Open · Inner display
Grid on one side, keys on the other
On the open display held sideways, the editor splits at the fold: the pattern grid on one side, the sound controls and note keys on the other, with the keys at the bottom.
About Chiptune
Chiptune is a step sequencer by Individuation Labs that writes NES-style music, with every sound made live from four channels like the console’s: two pulse waves, a triangle and noise. Tap notes into the grid, one channel per column, pick sounds and arrange patterns into a song. It costs $0.99 and runs on iPhone, iPad and Android.
On iPhone Duo, open and held sideways, the editor splits at the fold, with the grid on one side and the sound controls and note keys on the other, as the developer’s screenshots from the simulator show.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· Simulator screenshots reviewed
Simulator verified · iphone-duo
Looked at the website's captioned App Store screenshot of the open display, 1426 × 1003 pixels, half the size of the simulator's, with the 9:41 status ring: a song's pattern grid with its four channels on the left, and the sound preset, name and a piano keyboard on the right.
Poses shown: Open. These are observations of the evidence, not a test of every interaction.
App version: 1.3.1. Environment: iPhone Duo simulator.
App Store screenshots with no Xcode version; the cover isn't shown. No build was tested.
View reviewed evidence ↗
Watch it unfold
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Every iPhone app opens on iPhone Duo, but only updated ones fill the inner display. What an app looks like before its developer adapts it, how to tell which are ready, and which popular apps have said so.
Is this your app?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
<a href="https://foldhunt.com/apps/chiptune/"><img src="https://foldhunt.com/badges/featured-on-foldhunt.svg" alt="Featured on FoldHunt" width="220" height="54"></a>Need to update the listing? Email the editor.
Sources: Chiptune website (individuation.dev) · Chiptune on the App Store (apps.apple.com)
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