I found an odometer app for my phone and I really like it. It's called Endomondo. I used it today at the park and it keeps track of distance, speed, and time. I kept Luke home from school since we had a stomach bug this weekend, I just brought the double jogger and a bike that Luke and Bella take turns on. We r taking a break at the park but have gone 2.3 miles with 1/2 mile till we get back to the car. Time is slow cause the kids want to stop every couple mins for a break. I guess they r out of shape from lack of exercise all winter. Lol. I think we at 35 mins but hey we will get it done.