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.
Thanks to the feature called motion tracking chip in new iPhones (6 and 6 Plus) running iOS 8, Health app is equipped to track your steps like a pedometer. Just a few steps and you will have the best of know regarding your regular activities! Here is how you can easily track steps/walking distance using your iPhone's Health app on iOS 8. Let's move ahead with the process. You will need to enable a few functions and add them to the Dashboard of your Health app.
An in-app chat solution, such as Intercom. This will allow you to add two-way in-product messaging to any guided tours. Ideally your walkthrough tool can talk to this so you can message and tour users in tandem. A video hoster, such as Vimeo. Ideally your walkthrough tool can easily support showing videos from a Vimeo or YouTube link. You might also use a GIF creator, such as the one from Giphy (for Mac). An API manager, such as Segment, so that you can easily turn on and off various other tools.