How about just a simple script to monitor when i use my messenger the most?
Idea:
Simple: just save how many messages the user recieves per hour so that the user could see, whether he/she uses messenger the most in the evening or in the morning.
Reason:
It's of no use to be online in messenger, if there is no-one to talk to. Therefore inactive time could be used otherwise and messenger could be used more efficiently.
Please help, i couldn't do this myself.