FourSquare yesterday updated its iPhone application to allow users to post photos and comments when checking in - and says it's already getting one photo upload a second.
The company says that users have been asking for the features for months - and it's managed to get them out just in time for the Christmas season with all its attendant photo opportunities.
"Improve your day by telling a friend that you’re around the corner and they should swing by. And getting a last-minute comment reminding you to order the best dish saves your meal," says the company on its blog.
"Tips with photos changes everything. See dishes before ordering them, figure out if a venue looks fun, or easily identify a hard-to-find spot. More info equals better exploration."
Several of the company's partners have moved quickly to integrate the new features.
"Photos from Instagram pushed to foursquare will now be check-ins with photos (rather than just check-ins). Sightings on Foodspotting will be check-ins with your food photos. And picplz is the first service to allow check-in photos on both iPhone and Android," says the company.
Users can comment on the website and from check-in links posted to Facebook and Twitter. Photos and comments on check-ins are only visible to a user's friends, along with their social networks.
Because of the Christmas rush, Foursquare says there are a number of features it's still working on that didn't make it into the release. These include sharing photos to Facebook and Flickr, an easier way to keep track of comments and a better place than the history page to store old photos.
An Android version of the app will launch later this week, with WebOS and BlackBerry in January and other major platforms soon after. The API will be ready for all developers later this week.