Facebook has introduced a feature that lets advertisers choose which mobile devices and operating systems their mobiles ads will appear on. The new feature was quietly rolled out with Facebook’s new mobile app install ads two weeks ago. Developers using the Facebook Ads API or Power Editor can choose whether their ads will appear on iOS or Android devices in general, or iPhones, iPads or iPods specifically. As of now, there’s no way to target specific mobile device models (e.g., iPhone 5), though that’s probably on its way. This is a helpful feature for mobile device accessory makers, for example, but it’s also helpful in general given the socioeconomic differences between iOS and Android users. (TechCrunch)