Android 6.0.1 kept turning my WiFi off. :-(

This app can be configured to keep WiFi turned off, turned on, or leave it alone. Likewise with Bluetooth.

When first installed, it keeps WiFi on, but doesn't touch Bluetooth.

Important: this app may turn your Bluetooth on, or off, without prompting you for confirmation at the time.

NOTE: This app is no longer maintained. If it works for you, that's great. If not, I suggest uninstalling. It shouldn't take long to find out whether it works for your phone & OS version. As mentioned in the reviews, it doesn't work on all phones.