Determine the distance of a thunderstorm. When a lightning flashes then press "Start" and "Stop" when you hear the thunder. Due to the sonic speed and time measuring the distance will be calculated.
- Animation at flash (Start)
- Thundersound at Stop
- iPhone, iPod Touch, iPad
- OS 8.x or higher
- adapted for iPhone 4,5,6,7,8,10,11, iOS 8,9,10,11,12,13
Up to six family members will be able to use this app with Family Sharing enabled.