You can now control which Foursquare check-ins will trigger an alert on your iPhone. Previously, you were able only to turn alerts on or off for a particular Foursquare friend, and that's still the case for Android and BB10 users. With the latest update to the Foursquare app, version 5.4.3, you'll be able to assign a contact to one of three different notifications categories: Off, Nearby, Always.
When set to Off you'll never receive an alert for that contact. Nearby will work similarly to the way check-in notifications have in the past, and Always will … Read more