Does your mobile phone’s battery die more quickly than it once did? Apps may be the problem. Even if you did not add new apps to your phone, an app update alone can use lots of battery power. But you can check your apps to see how much battery they have been using. If an app you do not use much requires a lot of battery power, you might want to remove it from your phone. To check an iPhone or iPad, open the Settings app, then go to Battery. Recent battery use percentages for each app will appear. The device measures use in the last 24 hours and last seven days. You can also see whether an app has been using battery life to update. Tap on the clock icon for either last 24 hours or last seven days. That will show how much time the app has been open on your screen and how much time it has spent working. Android phones can show you which apps have used the most battery recently.