Why Is My Phone Consuming So Much Battery. And while it depends on each individuals usage more often than not the Facebook app tends to. I may be able to help you with this.

Because iOS and apps from the App Store are excellent at using the battery extremely efficiently. I understand you are having issues with your iPhone 7 using up so much battery life. But the Android app should not be draining your battery - if I check the battery usage in the Phones Settings on my Android phone it shows the Fitbit app is using 2 of the battery life.
My battery drained quite quickly and in total I recharged my phone fully 3 times yesterday.
Yes you will see many Androids with a lot higher Mah batteries than iPhones but to be honest Android is very inefficient and wasteful of battery charge so they need that much. And while it depends on each individuals usage more often than not the Facebook app tends to. I dont have an answer but I have a theory. My battery drained quite quickly and in total I recharged my phone fully 3 times yesterday.
