I used part of the "Laundry App UI Kit Sketch Resource" design that was designed by Satheesh Kumar at: https://www.sketchappsources.com/free-source/3397-laundry-app-ui-kit-sketch-freebie-resource.html to create a quick prototype

A simple animated Flowchart. Click on each tab and the arrows when zoomed in to transition to the next one. Design credited to: https://www.sketchappsources.com/free-source/3636-entity-relationship-model-erd-diagram-library-sketch-frebie-resource.html

A basic mockup of a sign-up/sign in screens along with a 2-way authentication of a uniquely generated code each time.

This 18 Cool Gradients was designed by Osama Dawood https://www.sketchappsources.com/free-source/3607-gradients-ui-kit-sketch-freebie-resource.html

Circular progress bar