Everything moves on the UI thread through react-native-reanimated v4. The island is a single shared value interpolated across top, width, height and borderRadius, so the collapsed pill, drawn at the iPhone hardware cutout metrics, stretches into the printer bar in one morph. The feed is deliberately not an ease curve: it is a withSequence of three withTiming calls on Easing.steps, 90 hard jumps in total, holding a constant line pitch of about 6.7pt while only the dwell per line changes, which is what reads as a dot matrix hammer instead of a thermal glide. The paper is an SVG path whose outline traces concave arcs where the perforation bites in, so the drop-shadow filter follows the notches rather than squaring them off. The peel in Stub.tsx is a reflection about a moving crease: a Gesture.Pan sets the crease as the perpendicular bisector between the finger's landing point and its current position, clamped to a +/-36 degree cone, and two clipped copies of the stub, one mirrored with scaleY -1, form the fold. Every layer is a plain translate plus rotate at transformOrigin '0 0', so there are no matrices, and scheduleOnRN from react-native-worklets hands stage changes back to JS. Tested on Expo SDK 56 with no custom native code; iOS and Android behave the same, though the island blend only lands on iPhones that have the cutout.
A boarding pass ticket animation: the Dynamic Island morphs into a dot matrix printer, feeds the pass out line by line, then you peel the stub off. The sheet is an SVG path with the perforation notches cut out of its fill, and the peel is a true crease reflection driven by a pan gesture. Drop it into ticketing, event check in, or order confirmation flows.
A Dynamic Island animation that morphs the pill into a card dispenser and pushes a black metal member card out of the slot. The card rides out lifted on a long shadow while a specular band rakes across it, then turns upright and drops to settle. Drop it into a membership upgrade, a loyalty tier reveal, or a wallet add.
A sun and moon position Live Activity for iOS: a Lock Screen and Dynamic Island widget that tracks either body along a dotted arc from rise to set. Built with expo-widgets, the moon card shows phase, illumination and a live rise or set countdown; a button flips it to the sun with daylight progress and sunset time. Drop it into any Expo app that wants a glanceable sky tracker.
A hold-to-confirm button whose progress bar is the light itself: a Skia shader sweeps the pill over a 2 second hold, and lifting early rewinds it. Every colour, radius and timing was fitted frame by frame against a reference recording, so the sweep and the flood at the end are measured, not guessed. Drop it on any destructive confirm: leaving a session, deleting an account.
