You just finished a 5 Mile Race . . . ever wonder what an equivalent 10K taking into account the slightly slower pace? What does your best 5K convert to over a Marathon? How about a mile?

The Running Performance Predictor uses the fast easy spinner on your iPhone or iPod Touch to calculate these equivalent times/races.

There are several popular formulas for projecting a running performance at a distance based upon the performance at another. This App uses three of them:

* Pete Riegel: Originally Published in 1977 in Runners World
* David F. Cameron: Which uses the 10 ten performances at various distances and uses them to computer comparison distances
* J. G. Purdy: A point system calculated from a table of running performances compiled in 1936 called the Portuguese scoring Tables.

Finally the app averages the three results.

Obviously, the closer the distance (i.e. 5 Mile and 10K) the more accurate the result.

No WiFi or Internet Connection is needed.