Apps Built for Foldable Android
Every CSX Developers app is engineered for the Pixel 9 Pro Fold and Galaxy Z Fold series from the ground up — not adapted, not squeezed. Unfolding your phone unlocks a completely different, expanded experience.
Apps Built for the Fold
MyDJ is in active alpha testing. Fold Video is coming soon — the only video app built specifically to use the inner and cover screens of a foldable phone simultaneously.
MyDJ
Full Mixer Layout
Unfolding reveals a complete dual-deck setup — left deck, crossfader, right deck — all visible at once. Waveforms, BPM counters, EQ knobs and cue points are no longer hidden behind tabs. The cover screen mirrors audio visualizations while your phone stays closed.
Fold Video
Dual-Screen Video Player
Purpose-built for foldable phones. Play video on the inner display while simultaneously showing a different view — artwork, controls or a second stream — on the cover screen. The only video app built around the fold hinge.
Also known as Flip Vid — name under development
How the Fold Actually Works
The Android Foldable APIs used across every CSX app.
WindowSizeClass
Jetpack's adaptive layout API. Detects Compact / Medium / Expanded screen widths and triggers the correct layout automatically when you fold or unfold.
FoldingFeature
Detects the hinge position, posture (flat vs. half-open) and orientation. Apps respond to the fold angle in real time — no restart needed.
SlidingPaneLayout
The Jetpack component that powers dual-panel layouts. List stays left, detail expands right — and collapses gracefully on smaller screens.
WindowInfoTracker
Live stream of window state changes. Apps collect fold events and react immediately — no polling, no lag, no missed transitions.
Cover Screen API
Selected apps expose dedicated cover screen activities. Glanceable UI on the outer display — see DJ visualizations or video controls without opening the phone.
Jetpack Compose
All UI built in Compose means layout responds declaratively to WindowSizeClass changes. No XML layout files — no fragile conditional inflation.
Own a Foldable?
Foldable testers are our most valuable beta users. Join the programme and help shape how these apps feel on fold hardware.