Here is my problem, when my arena boosts are in overflow (in stash) I cannot make difference between x1,3 lasting 15min and 30 min. I can see 2 solutions to this problem:
1. Kabam adds little clock in corner of item pic
2. Kabam adds description to items in stash (when you tap on it)
Proof of concept:

P.s. Sorry for 1min Paint job