Restoring the ability (even when the application off)

Good day! Sorry for my English
I want make in a game for Android renewable abilities. Suppose player has a several abilities, and when he spends them , it need to wait for a while to restore them .
Actually need a mechanism that will implement it . When application is running it's simple , but if it is turned off - that 's a problem . You can compare the system time, but it is not good, because it can be translated and thus cheat. Server - is not an option .
Are there other possibilities Unuity3d, allowing to implement a restoring, or any third-party plug-ins? Or is it done by OS, well, or something else?

 

If you want hard to cheat way, you need server for that.