Cross device data sync

[Joshimello]

Would it be nice to have data (or just courses) sync across devices?

A method could be:
Generate a key-data pair on database, give that key to the user to input, if user got key, then upload/download data.

Security issue:
We could just generate a long key ourself.

Offline issue:
Don't sync when offline :D

Any other roadblocks I missed?
What y'all think?

[Joshimello]

We could also add method to sync with school database, or have a 預排/Real timetable