When installed, each time you turn your wifi off, you will be asked how long you would like before restoring it. After that amount of time has passed, your wifi will be automatically turned back on.
Note that you need to launch the application from its icon at least once, else it will not be able to detect wifi state changes.
On Android 2.3.3 on my Nexus One, I started to have less battery time. I did this little app to save my battery while I'm at work and don't have a wifi access point. I hope this application can be useful for you too!
This is a free software application released under the Gnu GPL v3 or later.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
1.2.0 - Add action buttons on the notification for Android 4.3 and later, it lets you cancel or add 15mn to the timer or turn the wifi back on/off.
1.1.2 - Fix bug on Android Kitkat.
1.1.1 - Fix a bug related to airplane mode. The application couldn't be used in airplane mode before.
1.1.0 - Settings menu added to let you choose if you prefer Wifi Timer to show up when you turn the wifi on or off.