I recently purchased a new phone, the ZTE Axon 7. It's the flagship phone for ZTE, supposed to be comparable to the Samsung Galaxy S8 and iPhone 7. It is. It's a great phone. With it comes the Android Nougat OS and a function that I really like: Night Light. Basically Night Light is a blue blocker. It turns the screen amber at night. You can set up a custom schedule, which I encourage you to do if you have a phone with Nougat. Blue light causes eyestrain, especially in low lighting, and may even be bad for your retinal health. It can also interfere with melatonin levels and impede sleep patterns! Basically I think everyone should do this, especially children. Set up a time so that the Night Light comes on an hour before bedtime so that the last thing your child looks at before they retire for the day is not a super bright BLUE LIGHT screen. If you don't have Nougat OS you can download the Twilight app, which I've blogged about before. It has similar functionality.