Assessments are very important for both face to face and online personal training. I believe PT Distinction is the only online personal training software that allows you to create and record full assessments over Skype. Including things like movement screens, length tension test, performance tests and more.
However, there are certain assessments you may want your clients to do themselves and record the results as they do it. For these assessments it's definitely most convenient for your clients to be able to record their results from inside your app rather than having to login online.
This video shows you how to set up any assessments you you want your clients to record themselves in to their app and how to schedule regular assessment tracking for all of your clients very quickly.