NiteApps app for iPhone and iPad
This is an APP that uses Bluetooth Low Energy(BLE) of the phone for night light.
You can use this app to adjust the color and brightness of the night lights that support this app.
And also you can set a lot of personalized display modes to let the lights display as you like.
It is very easy to use, no need code pairing or other more setting, just install it and play it.