2.5 stars :

Its okay for being free..... But it spams you to buy the full version so much I may just delete it -.-

Countdown has nice features but I dont want your full version!!!!!! And spamming me about it makes me want it even less -.-!!!

Also the interface could use some work, personally I find it really ugly. But it does the job. If I find a better looking/has the same functions, I would delete this in a heartbeat.

chilllaaa about School Countdown - A Smart Class Timetable for Teacher and Student