Jackery for iPhone
Your iPhone is capable of lasting you for a few hours on a full battery charge. If you use your phone to make emergency calls, you need to monitor your consumption level to have your phone working when you need it. Jackery for iPhone is an awesome application that helps with that. It monitors battery consumption and lets you know how much time you have left and when you need to charge your phone.
This elegant application shows the information you need in a user-friendly fashion. It tells you when you should think about charging your battery, average battery life, frequent low battery periods, and more. You can set up the app to get a notification when battery level drops below a certain level. Of course, if you need your device to run for longer, you could always pick up a battery extender from Jackery.
Jackery for iPhone is elegant and easy to use. It provides you with useful information on your phone battery. The app is available for free at this time.