Multiple Users on one app

I would like to have multiple user on my app selling there own goods as well as being able to have GPS tracking so that customers can see where they are when user turns on that feature ( like different farmers markets)

Hi. These things are definitely doable in AppSheet. Here’s a help link on security filters (e.g. “show the current user their own things”):

And here’s a starter link for Lat/Long and GPS:

Hope this helps!