For battery usage, I've gotten some good info from the Carat app. http://carat.cs.berkeley.edu/ http://carat.cs.berkeley.edu/ On iOS and Android. As their s

For battery usage, I've gotten some good info from the Carat app. http://carat.cs.berkeley.edu/ http://carat.cs.berkeley.edu/ On iOS and Android. As their site says, "Carat is a free app that tells you what is using up the battery of your mobile device, whether that's normal, and what you can do about it. After running Carat for about a week, you will start to receive personalized recommendations for improving your battery life. Carat is a research project based out of the AMP Lab in the EECS Department at UC Berkeley, collaborating with the University of Helsinki." Certainly Verizon sees interesting data, but Carat has been really helpful to me. I see many recommending Onavo. I've had bad experiences with their "Extend" app: it proxied my data, often creating dropped connections, and created conflicts with VPN. I haven't tried Count, however.