This app was mentioned in 7 comments, with an average of 10.43 upvotes
For those walking, running or cycling consider downloading "Charity miles" they donate a certain amount for every mile you do.
Here's a link from the Android play store: https://play.google.com/store/apps/details?id=com.charitymilescm.android
Charity Miles on Google Play also I do recommend Walk for a dog on Google play as it does the same thing :) also available on iOS
I like Charity Miles since I like the idea of working out to raise a little money for a cause I care about, and I leave it on walk since I'm working up to longer run intervals but walk most of the time right now. Works fine for me. I use ghostracer on my smartwatch 3 too and compare and they're usually pretty close in reporting distance and pace.