Very great tool for meteorology geeks! The history display was a brilliant feature idea as it can provide evidence as to whether a storm is approaching or moving away. Accuracy based on atmospheric temperature is just one more added plus that makes this a very usable tool!

Haven't had a chance to use it yet (no thunderstorms or supersonic jet rides) but the speed of sound calculator seems to be correct. Love the description!

Piece of f@@@ing $hit

...to time the firework distance. Worked great acording to their map.

Not sure that I would need to track lightning but it would be interesting to see how far away the scrappers are from my house

Thanks for a useful app! I use it to track lightning between radar updates to decide whether to seek cover or take another ride. Comes in handy in texas where storms develop quickly.

I love it!

We learn a similar technique in the millitary for determining the distance of an artillery round landing from our location ( when just going by sight and sound).

App works great. Using it in the touch and works perfect! It's one of those "why not?" apps.

I always counted the seconds between the L&T, now all I need is my iPhone. Great little app. Thanks.

Great app. No problems with it. Doesnt freeze up. I think the speaker should pick up the sound of the thunder tho. And it's free

Then you've never been riding across the midwest in storm season on a motorcycle, wondering whether you're going to make it to the next town before the violent thunderstorm that seems to be in all directions around you catches you outside of your Faraday cage, and when you're the highest metallic object in a quarter-mile circle. I personally think that the program is practical...

Every time I know a thunder storm is approaching, I pull out my iPod and run this app. It beats trying to count out the seconds waiting for the thunder. The only thing I would change would be to have one large button vs. 2 small ones. 1st touch for the lightning and the 2nd touch for the thunder. The larger area would make it easier to watch the skies instead of making sure my finger is positioned over the correct button.

I bought this app looking for a stopwatch and I stumbled across this app. I think it is a cool app. I always wondered the time to distance ratio and now I don't need to it's really cool

Good app. Something similar was a favorite on my old Palm. Glad to see it on iPhone! A few improvements: (1) Having separate "Thunder" and "Lightning" buttons makes them smaller. Better for a single button of over twice the size to toggle between "Lightning" and "Thunder" with each tap, for easier operation while looking at the sky instead of the app. (2) Allow typing the temperature. Much easier than dragging a slider. (3) Should display the average time and distance of all records in the current log. This would average out errors in time in tapping the buttons across multiple lightning strikes, for greater accuracy in knowing the distance.