I want to mobile speedrun for something to do on the go and to avoid using my crap pc. any ideas?

This sounds like a bot post but in case it isn't: you need to be more specific. What kind of mobile games do you like? Do you have money? We can't give good recommendations unless you are more specific.

recommend PVZ it's free, and enjoyable

Can we start a category for Walk masters daily challenges I got a sub 10 sec in the final exam and I have nowhere to boast about it

@Sormight you would need to ask in the games own forums.