<p>Flickr added a new automatic upload feature to its to its iOS app on Wednesday, the service's latest effort to wooand woo backusers in the ultra-competitive online photo-sharing arena.After the app has been updated, Flickr prompts users to activate the new feature.</p><p>The optional feature will upload the 25 most recent pictures on your iPhone; after that all new photos will be automatically added to the serviceall photos are uploaded on a private basis and made public only if the user chooses to edit and share a picture. The app can be set to do the uploads over cellular networks, or only when the phone has access to a Wi-Fi connection. (The app prompts users to turn on the automatic upload after it has been updated; users will have to go into the app's settings to toggle the upload parameters.)</p><p>It's the latest effort by the Yahoo-owned Flickr to recover its ground in the photo-sharing and photo-storage market. In May, the company overhauled its service, giving every user 1TB of free photo storage.</p><p>But Flickr isn't the first service to offer automatic uploads of photos: its stiffest competition may be from iOS's built-in Photo Stream, but Dropbox has also long offered the feature, as have services Everpix and Loom. Which means that Flickr, once the grandaddy of photo-storage sites, is playing catch-up in this space.</p><p><a href="http://www.macworld.com/article/2053304/flickr-adds-automatic-photo-uploads-to-ios-app.html">Keep reading...</a></p>