Apps?

Im trying to find an app on my ATT LG (Im guessing its an Android) phone that will allow me to track miles... Heres the thing, Im nursing a sprain or a strain on my achilles tendon so I do a lot of Elliptical usage... I was just figuring to take the miles on the machine to input it somewhere so I can keep track of it as well as have a easier time participating in challenges...

Any suggestions?

Thanks for your time