This is an onboarding tool I created for UBER drivers. An UBER driver's first ride can be a little nerve wracking (I know from personal experience). This tool walks the driver through a typical flow to prepare them for their first ride. It is more interactive than a video and will give them more confidence before hitting the road.

If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.

An example of a sticky scrolling sidebar (website)

An example of a low-fidelity prototype, showing just enough details to give users an idea of what this app could do. Getting feedback through moderated user testing is best in this initial phase. The app's objective is to help you record your daily expenses, see an outline of your month's finances and compare spending with previous months/periods through charts.