I want to make an app so that on one screen, you can share your live location and on the other, you can see the location using CloudDB, I want to mark the location in the first screen shared with a Marker and the other person who is viewing the location to display his/her location too with a circle.
What have you tried?
Here is an example of an app that does something similar that . You might adapt the aia to your purposes.
Your app probably would work better if you used a virtual screen than a real Screen. Coding that would be complex. Using a virtual screen would be easier. 