The Google Play store has millions of apps. Some are great, many are duds. Our guide, which covers 13 key categories and 104 top apps, features the ones that deserve a place on your Android phone or tablet.With the right app, you can transform your humble cell or slate into a mobile movie theater.These 104 recommended apps are organized into 13 categories, including music, productivity, security, and utilities, so it's easy to find ones that suit your mood. Need an entertaining streaming video service? There's an app for that. In search of a dependable word processor that'll keep you productive while on the go? There's an app for that, too. Note that we don't include any games in this roundup. For those, check out our separate list of the best Android games.