Do you also count seconds to lightning after thunder and then you tried to calculate the distance of lightning? This app is for you. It can evaluate how far the lightning struck, and therefore about how far the storm.
9Apps 4.9
![국세청 홈택스 [손택스] on 9Apps](https://go.9appresource.com/sg/res/jpg/f7/df/69cc2f90120ec331db2630e0f5b6-6dh.jpg?x-oss-process=style/jmq200)
