My daughter recently upgraded her Apple iPad Mini to iOS 7 - and hates it so far. I'm sure she'll get used to it over time, but it was quite jarring for her. One complaint heard by iPhone users (moreso than iPad users) is a worsening of battery life after the upgrade to iOS 7. Quite a few articles have therefore shown up on how to reclaim some of that battery life, and this is a familiar struggle with mobile device users - the more doodads your device has, the more battery power it needs. Most of the articles cite fairly common-sense configuration changes, such as turning off auto-updating and location features (anytime data and WiFi services are used, it can be a significant battery drain). This one from Gottabemobile is pretty representative, and should be of help.