Amazon Spark Is a Pinterest-Like Shopping Social Network The new feature inside Amazon's iPhone app lets you follow specific categories and people, making it easy to buy things you find.

As if you don't already buy enough stuff on Amazon, the ecommerce giant just added a new Pinterest-like feature to its iPhone app aimed at helping you "find more of what you like."

Dubbed Spark, the new shopping social network lets you follow specific categories and people. Of course, Amazon has made it super easy to buy things there, too.

To access Spark, tap the hamburger icon (three parallel horizontal lines) in the Amazon iPhone app, select Programs and Features, then tap Spark. The first time you visit, you'll select a few of your interests: things like books, style and fashion, food, technology, do it yourself (DIY), home décor, beauty, recipes, video games and women's fashion, for instance.

From there, Spark will create a "feed of personalized content from other Amazon customers with similar interests as you." If you see something you like, just tap the product link or shopping bag icon to buy it.

You can also create posts to share a specific product or story, and "interact with people by commenting or smiling on their posts." We assume "smiling" on someone's post is basically like adding a heart or thumbs up.

Anyone in the U.S. with the Amazon iPhone app can look at posts on Spark, but you'll need to be a paid Prime member to contribute your own.

Just keep in mind that whatever you do on Spark is pretty much public. "Anyone can view your posts, comments, the interests you follow and see your Amazon Profile," Amazon said in its Spark FAQs. Your profile displays customer reviews you've written but does not show your purchasing or browsing history.