A free program for Android, by SmartJoys.
Finding phone by clapping is an app that detects the sound of your hands clapping and turns it into an alarm that will help you find your lost mobile phone.
How to use:
Open the app and tap the "Settings" option.
Go to the "Sensibility" option and tap the slider to change the sensitivity of the detection.
Set the "Alarm" option to the desired time.
Set the "Vibrations" option to the desired level of vibration.
Tap the "OK" button and you are done.
If you want to stop the alarm you can tap the "Cancel" button.
You can find the lost phone by repeating the sound of your hands clapping.