Just added a new update to the GPS data. Fixed a few issues with the standard deviation coming out much too large, as well as in an unreadable format. There is now a new options menu, allowing so the app only takes location data from GPS sources, or from any source. The second new option allows the app to update every 30 seconds or update every 10 seconds. Faster updates may increase the chance of bad data, but also allows faster data collection.
Go and get it here.
As always, please let me know if there are any bugs or issues.