Wapdroid-Pro

Wapdroid manages WiFi to save battery power, turning it on when near known networks, and off otherwise.

Features:
-cell towers used for location instead of GPS to save power
-view and manage stored WiFi networks
-turn WiFi off when the battery is low
-turn WiFi off when the screen turns off
-no ads

Explanation of permissions:
CHANGE WI-FI STATE
-required to allow enabling and disabling WiFi
CHANGE NETWORK CONNECTIVITY
-required for scanning for networks
READ PHONE STATE AND IDENTITY
-required for getting cell tower information
PREVENT DEVICE FROM SLEEPING
-required for monitoring briefly with the screen off
COARSE (NETWORK-BASED) LOCATION
-required for location information
FULL INTERNET ACCESS
-required to get cell tower information