Doesn't work

I've been using Cashwalk for a couple months now. I've recently been noticing steps are not tracking correctly. My brother and I went on a walk together. Exact same distance. His pedometer (not cashwalk) tracked over 10,000 steps. My cashwalk a measly 2,600 steps. I do more steps than that walking round the park. I like the app and the idea of getting rewarded but what's the point if its not accurate?