Playing no multiplayer games leaves your readiness rating at 50%, meaning that a 5000 military strength score is reduced to 2500. Raising your galactic readiness rating simply lets you apply more of your military strength into effective military strength.
These apps are called Infiltrator, and Data Pad. One way to increase your military strength is by increasing your galactic readiness rating. The galactic readiness rating is only raised by playing the Galaxy at War multiplayer games (which require the Online Pass), or by playing a couple of the games for iPhone and iPad. In Mass Effect 3 for the PC, PS3, and Xbox 360, one of the primary ways to see the different endings to the game is by gaining a certain number of effective military strength.
