HexRinger is save your battery, because don't use GPS.
Locating your position from WiFi or Cellular network.
Supports auto WiFi on/off configuration.
Please make sure you update the app once started. *Does not start regular execution resumes.
** Getting Started **
1. Tap your area on map (often it's your home).
2. Tap [START] Button.
3. If you leave area, turn off ringer mode, and if you enter area, turn on ringer mode.
** Requirements **
* Android 1.6 and later
* Enable My location
** Notice **
* This application used GeoHex(by @sa2da).
* Please feedback to twitter:@HexRinger.