@andrei1089 - great work - looking forward to this passing into extras. Would be really good if it could just monitor steps and also use the GPS as this would be most accurate? You could then either do this for a period and "train" the application, or keep it on all the time? I've found purely step based pedometers to be less than accurate, especially over longer distances.
For me i would like that the timer is stopped when not walking (standing at a traffic light for example), so the speed is more accurate. Maybe it can have a second timer for pauses.