Three miniature computers. One very real folding screen.
Everything runs locally in your browser.
Screen asleep. Computer still running.
Wake using the power button or keyboard.
Three vibes. None of them need a subscription.
With a supported browser, the display and keyboard snap to the actual physical screen segments. If your browser only exposes one screen, calibrate the split to your crease.
Manual split is used only if there are no suitable viewport segments, or you force an arrangement.
Chrome 138+ supports viewport segments on compatible devices. The Device Posture API reports folded/flat; the browser does not expose an exact hinge angle. Fullscreen may give the best fit.
Folded shut: your tiny computer is sleeping. Unfold the phone to return to the keyboard.