This app was mentioned in 3 comments, with an average of 1.67 upvotes
I previously used this - https://play.google.com/store/apps/details?id=com.hmravens.simplywalking
Really simple but accurate, I used it mainly for walking but it tracked me just as well when I pretended to run.
Give this a try - https://play.google.com/store/apps/details?id=com.hmravens.simplywalking