Calculate distance of lightnings and find out how far away the storm is. This app calculates distance using difference between speed of light and sound.

Just tap a button when you see the lightning and then again when you hear the thunder and the app will tell you how far away it is using a time difference between the two.

What’s New

Version 1.6

• improvements and bug fixes

Thank you for all your feedback, reviews and support!
If something does not work, please let us know via the menu within the app.
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Ratings and Reviews

3.2 out of 5
38 Ratings
38 Ratings
g33q ,


No input from lightning sensors... relies on user to click when the see lightning and click when the hear the matching thunder... in most cases if one sees lightning they should have already taken shelter so I’m not sure what the purpose of the app is... i suppose having a stopwatch gets the distance calculation more accurate but to what end? Knowing the lightning struck 2 miles away versus 3 still means the same thing, get off the fricken golf course/out of the pool/ etc and take shelter...

Car tha bose ,

So cool

This app is so great I grab the first time well


DOUBLE U s.r.o.
44.2 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Czech, German, Slovak

Age Rating
Rated 4+
© 2016 Double U
In-App Purchases
  1. Remove ads $1.99
  2. Remove Ads $9.99
  3. Remove Ads $4.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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