Best Apps for iPhone Duo: What Makes an App Truly Foldable-Ready?
The difference between an app that merely runs and one that uses the inner display, Split View, drag and drop, and adaptive layouts well.
Four signs of a good Duo app
It adapts without black bars or clipped controls, keeps state when moving between displays, supports drag and drop where useful, and remains accessible at larger text sizes.
Our Duo app directory tracks these qualities rather than popularity alone. For a creative example, read the DuoSketch review.
Categories with opportunity
Email plus calendar, browser plus notes, photo library plus editor and chat plus document are natural pairings. Reading apps can use the inner display without imitating paper; developer tools can move logs away from the canvas.
Compatibility is not optimization
An existing app may run safely in a conservative frame. That is valuable compatibility, but differs from an interface designed for changing width. Our article on why apps show black bars explains it.
How we evaluate
We look for layout stability, useful second-pane behavior, keyboard support, drag and drop, readable typography and reliable resume after folding. Pre-launch entries are labeled as research until hands-on testing is possible.
Start with our five Split View workflows, then build a setup around tasks you already perform.
From the maker
Get PromptSlate Studio on the App Store
Write, prompt and record in one focused workspace. Out now — $9.99 one-time, no subscription. Every download supports independent development of new apps.
See PromptSlate Studio details · Also in the works: DuoSketch
Spotted something to fix, or an app we should cover?
This article is independent research, cross-checked against Apple's developer documentation. If something's out of date, or you know an app that deserves a look, let us know — and if you're building for iPhone Duo yourself, we're happy to talk.
hola@ayudantedigital.es