I’m a huge fan of 신박사 and his books, but this app doesn’t work as it should. Other similar apps I’ve used allow me to “focus” with my screen turned off. The Focus app, on the other hand, forces you keep the screen turned on, which seems like a huge waste of battery, especially with more lengthy focus sessions.
I really hope this gets fixed. As of right now, Forest (app with exact same functionality) seems better.