Foldcade

What I built

1. 01

   Built exclusively for iPhone Duo, the app treats the fold as part of the experience: the outer display is a cartridge case for picking a game, and unfolding turns the inner display into a console split exactly at the hinge, with a curved CRT above and a control deck below. Folding pauses the game and unfolding resumes it.

2. 02

   Uses the iOS 27.1 hinge APIs to drive the CRT curvature, an unfold chime with haptics, and a game controlled by folding the device. Layout follows the fold's reserved regions and moves content aside from an active camera.

3. 03

   Twelve original games run at 60 FPS in a SwiftUI Canvas behind a Metal layer-effect shader with four screen modes (Color CRT, Pocket LCD, Trinitron, Arcade Monitor). A six-channel chiptune synth on AVAudioEngine plays sound effects and per-cartridge music, alongside CoreHaptics feedback, skins, achievements, daily challenges, a pixel-art label designer, and VoiceOver support.

4. 04

   Monetized with a single StoreKit 2 non-consumable whose contents are derived from the items it unlocks, and covered by unit tests for purchases, restores, and refunds.