I don’t know if anyone mentioned it already, but they could add a button to use a booster because, for example, now I have all campaigns maxed out and i’m just wasting boosters. If they would add use button i would use my whole boosters in next update
They have created the booster for expire in 18H if you dont use them
yeah i know but i mean you can use it at any time and then have 18 hours to play