The circuit is defined as normalized cubic bezier curves (all coordinates in 0–1 space), then scaled to fill the screen at paint time — so the layout adapts to any device size with no recalculation.
Apple’s more affordable “e” series iPhones have always played it a bit safe with features, especially when it comes to displays. While many Android phones in the same price range already offer 120Hz ...
This transition uses a ClipPath mask — the incoming page is rendered once and only the clip shape changes per frame. No snapshots, no extra layers.