Phone looks great. A bit plasticity but good for the price. Screen is good. Software not fully baked but still good enough. FlymeOS allows you to control which applications can use data and wifi, which to keep running in the background after screen off(greenify types), and control permissions.
We can control which apps can auto start and which can’t. You won’t need extra apps for these things. Battery backup is good. It can be even better of you play with these settings well. Camera is good.