Great program! I've used the iOS app for years and love how fast it works and how simple it is to use. It keeps track of my daily and weekly trips and when I'm finished the data is stored for analysis later. I'm already getting ready for another season of racing. Great product! Trackers has helped me immensely during training as it gives you instant feedback after each ride or run so there's no guess work involved. With this information at your fingertips you're more likely to reach those goals before they even start.