Foursquare announced its gift to iPhone users, in the form of a version 2.2. The latest update of Foursquare for iPhone allows users to comment on their friends' check-ins, enabling them to say that they're just around the corner. You even get points for commenting on your friends' check-ins, if that's the sort of thing that keeps you up at night. You can also leave comments from check-ins posted to Facebook and Twitter from the Foursquare website.
Other presents in version 2.2 include tips with photos, where you can add photos to the tips you add making them tippier, as well as a history page where users can see their own check-in history with photos and comments.
To have a better Foursquare experience, users are advised to turn on push notifications so when their friends send them a tip or a comment on their check-in, they're able to see it right away. Also, photos on check-ins are only visible to friends on Foursquare and other social networks like Facebook and Twitter. Photos on venues and tips are visible to the entire Foursquare community.