From the same developers as the recently updated and one of our favourite apps FlickStackr for Flickr, PhotoStackr is a similar app but allows you to browse, upload, like and add comments to photos on Facebook. It’s also received a similar update to FlickStackr for Flickr. Check out What’s New below. PhotoStackr for Facebook usually retails for $0.99/£0.69 but today you can pick it up for free. Click here to download.   What’s New?   – Ipernity support (in-app purchase) * Browse your own photos, your contacts, interesting photos * Browse groups * Comment & favorite photos * Modify your own photos * Upload photos and videos to Ipernity *…