Almost no one reapplies sunscreen as often as labels recommend (every 2 hours of sun exposure). The reason isn't laziness — most sunscreen formats don't work over makeup or during active days.
Formats that solve the practical problem
Powder sunscreens (Supergoop! (Re)setting, Colorescience Sunforgettable) apply with a brush over makeup. Sunscreen sticks (Beauty of Joseon Matte Sun Stick) slide on without disturbing base. Both fit a handbag.
When daily reapplication matters most
Outdoor activity, beach, hiking. Office workers near windows (UVA passes through glass). Drivers on long journeys (driver's-side window age spots are common). Light exposure over years produces most photoaging.
Find the sunscreen format you'll actually carry. The protective effect comes from frequency, not from the SPF number on a bottle that lives in your bathroom.