A metronome and tuner: one-hand layout closed, a two-column practice stage open
Does Metronome: Rhythm Trainer work on iPhone Duo?
Yes. Metronome: Rhythm Trainer's App Store page says it supports iPhone Duo, so the update is out. FoldHunt's editor hasn't seen it running yet.
- App Store confirmedThe developer, in the release notes for version 1.8.0 (released October 8, 2026): made for iPhone Duo, adapting to the folded and unfolded display in portrait and landscape, with a two-column layout unfolded. There are no pictures of it on the Duo yet. The App Store seller is Phillip Paul (id 6775570055).
Adapted for the fold
We're waiting on details of exactly what Metronome: Rhythm Trainer changes for the fold. Are you the developer? Tell us.
About Metronome: Rhythm Trainer
Metronome is a tempo trainer with presets, accents and subdivisions, plus a chromatic tuner. Version 1.8.0 is made for iPhone Duo: closed, the familiar one-hand layout keeps Play on screen; open, it becomes a roomier two-column practice stage. There are no pictures of it on the Duo yet.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· App Store page reviewed
App Store confirmed · iphone-duo
The App Store description mentions iPhone Duo: "ACCURATE TIMING, EVERY TIME Set 1–400 BPM on iPhone, iPhone Duo, and iPad with a precision slider and ±1/±5 steps." (version 1.9.0, released October 19, 2026).
App version: 1.9.0.
Store text only: we haven't seen the app running, and the store page doesn't show how each pose is used.
View reviewed evidence ↗
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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?
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Sources: Metronome: Rhythm Trainer on the App Store (apps.apple.com)
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