A new button in Pinterest's iOS app makes it much easier to add those pumpkin-seed muffin recipes to your boards. Considering around 80 percent of Pinterest's traffic comes from mobile devices, it's surprising it took the company so long. To find the button, simply launch a mobile browser, click the Share option and then the ellipsis that says "More" underneath. Once there, find Pinterest and toggle it on, then you'll see its icon on the Share panel next time you want to save a web page. It worked not just on Safari, but also for Chrome when we tested it, so we recommend trying to add the button on your favorite browser first (and then go bake the muffins).