I have just submitted version 1.4.0. The big change in this version is TRACKS!!!!!
Tracks allow updating in any interval you want. I have chosen to update your track every 5 seconds. I then buffer this information and send it to SpotWalla once every 5 minutes. Out of cell range when that happens? No problem. I will buffer all of the messages until you come back into range and then send the info to SpotWalla.
For more information about Tracks, please visit the Tracks page on the SpotWalla page.