Really? Which part of "App Manager" in the applications menu eludes you?

Your biceps got bigger from repeatedly lifting a piece of hardware that weighs about 181 grams? What are your arms made of, straw? Toothpicks?

Seriously, why don't you RTFM and look around the forums for a bit? There's a pretty good chance all of your questions have been asked before... aside from your now ginormous twig sized biceps.