Each frame below is a real viewport at true device size, so the atlas inside resolves its own breakpoints exactly as it would on the hardware. Use this to check the bottom bar, the drawer, the six tabs and the 44 px touch targets without a device in hand — then confirm on glass, since finger size and Safari's toolbars are the two things a frame can't fake. Back to the atlas →
Touch targets. Every row, chip and tab is built to 44 px, but only a thumb confirms the bottom bar's five buttons are distinguishable without looking.
Pinch and pan. The map owns two-finger gestures; check that scrolling the sidebar list never drags the map underneath it.
Safari chrome. iOS collapses its toolbars on scroll, which changes the visible height mid-gesture — watch that the bottom bar stays put.
Presenter mode. Turn it on, then stand where the back row of the class will be.