Pinterest's visual search, WhatsApp's new security: all the app news you need to know

With even more iPhone rumors (stretchy screens and touch-sensitive backsides, anyone) and more bizarre robots than we can keep track of, you may have lost track of some of the best new apps.

Luckily, we're keeping score for you for you. Each week, we round up the latest app news, along with a few of our favorite new and updated apps, to keep you in the loop with everything coming to your phone.

Here's what we were following this week.

In social media land...

Pinterest wants to make it easier for you to buy stuff. The company introduced a new set of visual search features, including one called "Lens" that lets you shop for products based on photos you take with your smartphone.  Read more...