In order to access my meteor mondgodb database I used the ObjCMongodb package here. The following code was then used as stated in the ReadMe to connect to the meteor app running on the localhost.
MongoConnection *dbConn = [MongoConnection connectionForServer:@"127.0.0.1:3002" error:&error];
MongoDBCollection *collection = [dbConn collectionWithName:@"meteor.messages"];
Where the port was 3000, but the mondgodb was +2 making it port 3002. The collectionWithName was then meteor.(my collection wanting to be accessed)
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Special thanks to noa and Akshat.