Hello. I use your android app at 2 devices: LG nexus 5 (Snapdragon SOC, Adreno GPU) , Samsung galaxy Note 4 (Exynos SOC edition, Mali GPU).

I have no problem at snapdragon SOC (nexus 5), all runs smooth and fast.

But.. When i use your app (latest version from market) at brand new samsung Note 4 (Exynos SOC, android 4.4.4), the app lags like a hell... animations not smooth at all (especially when opening main menu - Inbox, today, next, tommorow etc). I am sure, that the problem in not optimized Exynos SOC.

You should to test your android app at exynos SOC device and fix the problem :)