Dot Lock is a nice, free iPhone app and has been created by ApQ2be.
More about Dot Lock
The program version is 1.1.1 and was updated on 2/01/2012. Dot Lock is available for users with the operating system iOS 4.2 and up, and you can download it in English, Spanish, and German. Since we added this app to our catalog in 2012, it has managed to reach 7,274 downloads, and last week it achieved 4 downloads. The install size of Dot Lock depends on your mobile device.