A scholarly resource must be written by a scholar - an expert in the field, usually with a PhD or equivalent qualifications. Scholarly resources usually tell you about the author, so that you can assess whether s/he is a reliable expert on the information presented.
Walkmeter uses GPS to measure the distance of your walks and hikes outdoors. It functions much like a stopwatch. Open the app, tap Start, and use Lap when you want to log an interval. It maps your walk, and you can view time, speed, distance, and pace as you walk.
Steps - Calories - Distance Tracking with Fitbit Zip. What you get with the Zip: Steps: The pedometer mechanism accurately tracks steps, resetting each day at midnight. You can see the total daily step count on the Zip and app. The web site shows details for every five minutes of the day.