You can register your free account via the web portal OR mobile app available for both iOS and Android. You just need to register one time to initially set your account up.
Step 1: Go to https://autosist.com/portal/
Use links below or search “AUTOsist” on App or Play Store on your mobile device
General Mobile App Overview Video: https://youtu.be/TqG1D0pNHYI
Getting Started Guide: https://autosist.com/gettingstartedguide/