Lightning Distance Calc app for iPhone and iPad

Lightning Distance Calculator is an application witch allows you to measure the distance from a lightning strike basis of the difference in speeds of sound and light. Application also shows the precise impact location based on azimuth determined by the built-in compass.

The measurement results can be viewed as:
-history table
-chart
-on the map.

Features:
- Measuring the distance from a lightning strike;
- Indication of the exact impact location;
- Presentation of the impact location on the map;
- History chart;
- Sending an e-mail with thunder maps;
- Various distance units.


In App Store, there is also a free, limited version available. Feel free to test it.