I wasn’t happy with the performance of the Google Activity Recognition Service as it was creating problems with the response to user movements during navigation.
Taking it out and replacing it with my own algorithm not only reduced the overall size of the application but has improved performance significantly. Future enhancements will largely address user interface elements.
If you would like to see additional features added such as an automated emergency notice which shares your current location via SMS. Please let me know in the comments below or contact me via Google+ or Facebook.