Buy With a little help from your friends. Scanaloop is a social product review app that allows users to take pictures of products they are interested in purchasing and request their Facebook friend’s opinions to "buy" or not. If you aren't sure about a product, take a picture with Scanaloop and "loop" your friends for advice. Your friends can comment on your request or send a quick "buy" or "don't buy" notification. Whether you love or hate a product- make sure your social circle is "looped in".