Wood, Glass, or Metal, but in the future I might add other things for you to knock on.
If you have other ideas please post them in reviews... I will try and read them and update it!
1.1.1 (1/13/09): Added glass and metal. Also better wood noise.
1.0.1 (1/12/09): Fixed a crash issue when you knock really fast.
Jun 8, 2014
test access to protected storage
modify or delete the contents of your USB storage
read phone status and identity
Add to list
Write the first review for this app!