I have the app in my Android Phone but, to be honest, I barely use it. The app is good, but it's VERY slow (at least in my mid-range android).

Sometimes I want to play the game, but get bored due waiting the app to load. I usually end up going to the PC to play the game, as it's lagless and fast.

Having an optimized app that loads fast and is easy to use will make the game even more popular and attract way more players; after all, the mobile gaming is the future.