WiFi Automatic :

This simple app will help you maximize your device’s standby time: when you don’t need it, WiFi Automatic will automatically disable your WiFi radio, increasing battery consumption.

When you turn on your phone or reach a designated location (requires a cell radio and therefore does not operate on WiFi-only tablets!), you can also decide that you will automatically turn on WiFi again.

WiFi Automatic is open source: https:/github.com/j4velin/WiFi-Automatic

Permissions:

RECEIVE BOOT COMPLETED – is required to start the service again when rebooting your device

The following permissions are required to observe and change the WiFi state:

CHANGE_WIFI_STATE

ACCESS_NETWORK_STATE

ACCESS_WIFI_STATE

The following permissions are required to the “turn on WiFi when entering these locations” feature:

INTERNET
WRITE_EXTERNAL_STORAGE
ACCESS_COARSE_LOCATION
ACCESS_FINE_LOCATION
BILLING