A simple to use utility to calculate the distance to a storm based on the time elapsed between the lightning and the thunder. When you see the lightning: hit the 'Lightning' button, then when you hear the thunder: hit the 'Thunder' button. The distance to the storm will be shown.
Thunder Clap works on all Android devices using Android 1.6 or higher (including 2.0, 2.1 and 2.2).
You can download it FREE from the Android Market (Note: This link only works from within your Android device).
You can read more about it here: http://android.garysims.co.uk