Gun disassembly 2 - awesome app with crap tons of 3d models that you can full detail strip. It's given me countless hours of fun but costs to get more guns.
Gun Log - freaking sweet log for all of your guns, ammo, ballistics logs and more. It actually helped me out in a sticky situation once because I had all of the info stored in it regarding a sale of one of my guns.
Spotter - range finder that is really helpful when sighting in rifles. Uses the camera in your phone and known measurements to calculate range of your target.
Practice deck - pretty cool setup that has drills and practice routines. I use it for IDPA and it has seriously improved my shooting.
On the other hand,
Check out some podcasts. I know you have an android but there are apps to download them. Check out gundudes, the gun runner podcast and the handgun podcast. All good stuff to listen to at work or during downtime in the garage.
If you've got one foot in yesterday, and the other in tomorrow, than you're pissing on today.