Different types of shoes and is the tracking accurate?

self.StepN1m ago
So I'm new to StepN and tying to find which shoe would be best for me. I'm looking inot joggers since can't run a lot for a long amount of time and I think joggers will be the sweet spot since I get paid a decent amount and I'm not full sprint running. If anybody knows can they tell me what is the optimal speed of each shoe like optimal speed for walkers, joggers and runners. Also I saw that the tracking wasent to accurate on StepN a few months ago so was that fixed if my mobile data is working perfectly will the app count the speed accurately?