This app was mentioned in 1 comment, with an average of 4.00 upvotes
I'll start the ball rolling...
a) Conflict Series: Finnish Defense 1944 [Android]
https://play.google.com/store/apps/details?id=com.cloudworth.finland
b) With limited time at the moment, I'm always playing a Conflict Series game on my Android device, because I can drop in and out at will, and still get some deep wargaming done when I can. I really enjoy the way that the developer (Joni Nuutinen) of titles in the series, weaves his arsenal of mechanics into a game with an accessible (and familiar) interface, yet tweaks the experience around the era and specifics of the games theme. (Theres a free version if you want to taste what the Conflict Series play like without pulling the trigger on the paid version).
c) Probably Sengoku Jidai: Shadow of the Shogun. When I have a bit more time, I need to fully appreciate this Japanese themed mod turned fully flegded stand-alone update to the Pike & Shot series.
http://www.slitherine.com/products/603/details/Sengoku.Jidai:.Shadow.of.the.Shogun.