Check if point exists within a polygon in react-native-maps?

react-native-maps doesn't expose that function, but there are two packages that I'm aware of that can help you:

  1. react-native-geo-fencing that does the same as the google maps utility you've mentioned.

  2. react-native-geo-fence handles location checks for you and exposes events you can hook into.


For anyone still looking for an easier alternative (or for Circle support just like I needed it), look into using geolib: https://github.com/manuelbieh/Geolib.

Installation is simple and straightforward:

$yarn add geolib

Afterward in your React Native project, import it using:

import geolib from 'geolib'

And then just use the API as explained in the README.md.