I use the calendar that's built in my phone to remind me of my school schedules (where I need to go and when, I can never remeber that).
Other than that, I use a bullet journal. Not an app, but allows me to remeber some events and plan out schedules. There are bullet journal apps, but I prefer pen and paper.
Exactly! I think that the solution to this issue is to ask more questions on Lemmy. If more people ask, we may be able to get more information without having to type "reddit" after our questions X)