Download it now: Apple App Store, $0.99

The way you charge your phone has a lot to do with how your battery will perform throughout the day. Battery Boost Magic lends a hand with a three-step charging process to ensure an accurate full cycle charge so you get the maximum amount of battery life. It also allows you to do a quick charge if you're in a rush. Of course, you can closely monitor your phone's battery performance from the app—you can see how much time you have to do a number of different functions. It also gives you tips to maximize your battery life if you're in dire straits.