What do I need for CMRA to work? Team CMRA You need an Apple Watch (original, Series 1, Series 2 or Series 3) running OS 3 and an iPhone 5 or later running iOS 10. Related articles Why should I use CMRA? What do you mean by “Pre-order”? Is this “crowdfunding”? Who created CMRA? Is this Apple? Is CMRA a smartwatch? What is CMRA?