Very handy for preventing jet lag
I used this app for a trip to Japan which is 7 hours + from my usual time zone. The experience was great! I got notifications telling me how to act, when to avoid caffeine, when to sleep, and so on. I could also easily overview my whole schedule for the day regarding my jet lag prevention activities. I am usually very sensitive to loosing sleep and such, but by using the app I felt almost no jet lag at all. 10/10 would recommend!