Is it possible to track of battery consumption by all installed app on ios device?
There is a app called Carat that might be overkill but it is way better than just watching the consumption.

It actually recommends what to do to save battery life.

One drawback is, it will not imminently show what needs to be done. 

It will take >24 hours of monitoring your usage and then make recommendations on which apps to kill and how much battery life you get.