You can't release a AAA console game these days without also releasing a mobile app. For some reason. If you're looking for a way to actually play your big fancy shooter game on your tablet... well, this isn't really it, but it's close. The Battlefield 4 Commander app lets BF4 players coordinate their squad and hand out extra supplies during live Battlefield games.
Once you reach level 10 on the Xbox 360, Xbox One, PS3, PS4, or PC version of Battlefield 4, you gain access to the Commander app, which mirrors the Commander mode in the full game.