Hey Hackernews, I try taking naps for 90mins; 30min naps do not work for me (I can't fall asleep). But whenever I nap for 90mins, I snooze repeatedly until I stop and go back to sleep. Does anyone have any apps or techniques or anything that would help me wake up ;-;

For context, I've tried some apps that make you solve puzzles / maths problems but when I'm tired I just restart my phone and the alarm stops (because they're not particularly well made).