Old PC-98 MIDI songs, controls on the cover, split half-folded, all 32 parts open flat
Does Retro MIDI Player Mobile work on iPhone Duo?
According to its developer, yes. FoldHunt's editor hasn't checked Retro MIDI Player Mobile on iPhone Duo yet, so it's listed as a claim.
- Developer claimedThe developer, @FoamyDreamIR on X, says the Duo update passed App Review and posted a video of the Duo layouts (@FoamyDreamIR on X). The App Store release notes for version 1.4.0 (October 7, 2026) say it now supports the iPhone Duo.
Adapted for the fold
- Closed · Outer display
Keep playing on the cover
Closed, the cover shows the current song, the track list and transport buttons along the side, so playback carries on with the phone shut; turned sideways, it shows the orange LCD-style display.
- Book · Partly folded
Display on top, controls below
Half-folded, the falling-note piano roll or the score with pitch and expression graphs sits on the upper half, and the player, the orange LCD-style meters and the song list sit on the lower half.
- Open · Inner display
All 32 parts, like the iPad
Open flat, it uses the iPad layout: a grid of all 32 parts across Port A and B with the song list and a side rail of playback buttons.
About Retro MIDI Player Mobile
Retro MIDI Player Mobile opens songs made around 1990 with Recomposer on PC-98 computers, in their original RCP, R36 and G36 files as well as standard MIDI files, and plays them with a built-in sound source or external MIDI gear. On the iPhone Duo, the developer’s video shows playback controls on the closed cover, a top-and-bottom split when it is half-folded, and the full iPad-style 32-part view open flat. The release notes also describe a left-and-right split for the half-folded phone held sideways.
On the ideas wall
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Sources: @FoamyDreamIR on X (x.com) · Retro MIDI Player Mobile on the App Store (apps.apple.com)
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