We are all interested to know how much battery energy every software application uses up.
If your version of android is 4 or above, then you have access to the battery information of your gadget (only the difference between default applications and the downloaded ones)
But if your android version is below 4, you need to download extra applications.
One of the best suggestions we can give you is ZDbox.
It shows accurate information about your battery and the percentage that has been used by every application.