I’m currently trying to remake geoguessr with Inventor, as a school project, but I struggle to get a street view. There’s a tutorial that says I could use google map’s api to make a street view, here’s the format.
You asked: “What happen if I use the google map API on the webviewer but users didn't buy a pro member?” Nothing. The user will get a notice from Google that you do not have access to the map services Google developed. If you have an api key, the app will work but after USERS use up the free usage credits users provide developers have to start paying for the service and USERS will get the not working message until you add more money to the developer account.
You need to provide a Google MAP API key to use Static Maps. I don’t believe you can use the WebViewer script required to view Static Maps without using a developers api key.
This explains
However, you probably can make your geo guesser using OpenStreetMaps (uise the native App Inventor Map component to locate places on OSM tile maps).
Here is a tutorial to do something similar
This example uses ActivityStarter and displays a Google map:
