Speed Distance Time Calculator

This is a useful app for all runners and joggers out there who always want to know how fast and long they run. No adds and no extra permissions required, all open source!

Unlike the other apps of this kind, this is a 3 in 1 calculator only on one screen and with a flexible input. You can calculate your time, distance or speed when you know the other two. Just go ahead and fill in any two values for speed, distance or time, and the app will calculate the 3rd while you are still typing the values in.

This app also has the advantage that you can edit the output to see how the other values change. For example you know that you can run a 3 km lap in 16 minutes, and you get the pace which is 5m 20s. But you want to see what time you would get if you run with a pace of 5m 10s. No problem! Just make sure that the last value you edited is the time, and now just click on the pace and put in what you want, and then you would get your time!

So, enough calculation, and start running!

By the way, this is one of my firsts apps, so any feedback would be greatly appreciated.

If you want the source code it's here: https://code.google.com/p/speed-distance-time/
A browser based version of this is at: http://infloresc.ro/sdt/