react-native-system-setting VS react-native-geolocation

Something like this? https://github.com/c19354837/react-native-system-setting

Then watchPosition from @react-native-community/geolocation is definitely the way to go. Here's a link to the example in their repo. This will constantly update the position state variable, which you can then send to a realtime service which other users are subscribed to and consuming. (Depending on your implementation, could be a websocket or some pub/sub service... I've worked with Pusher Channels before for something similar.)

I like this one https://github.com/michalchudziak/react-native-geolocation

For location, you can use the [geolocation library](https://github.com/michalchudziak/react-native-geolocation). If for some reason the user blocks this permission, a neat little trick is to call this API, [https://ipapi.co/json/\]([https://ipapi.co/json/](https://ipapi.co/json/)). They will get the users Longitude and Latitude based on the requesting IP. Of course, that will be masked if they have a VPN running. But it is a second attempt at getting a location.

You can just use react-native-geolocation and it's watchPosition method to just listen to location changes and respond to that accordingly. If it comes within 10-15-20-50 meters from the college you can count that as arrival.

Here's some APIs to look into, maybe you could do searches based on libraries https://github.com/michalchudziak/react-native-geolocation

@react-native-community/geolocation