When you open an app on your mobile phone or tablet, you do so by looking for and gently tapping on its icon. If you use a given app frequently, it can be disorienting to have its icon change. Today Instagram, the super-popular app that you use to browse photos of your friends’ brunches, their cats, and their cats’ brunches, changed their logo and app icon. They took a lot of care to make sure that the design is fresh, but familiar enough that it’s instantly recognizable. [More]