Skoog is compatible with iPad models that support Bluetooth Low Energy, including iPad 3rd Generation, iPad 4th Generation, iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPad mini 4 and iPad Pro. It is compatible with Operating System 9. Our iOS apps are also compatible with iPhone and iPod models that support Bluetooth Low Energy – iPhone 4s, iPhone 5, iPhone 5c, iPhone 5s, iPhone SE, iPhone 6, iPhone 6 Plus, iPhone 6s, and iPhone 6s Plus.