How do I install the doppel app? November 22, 2018 12:46 Updated Download the doppel app for iOS from The Apple Store or for Android from The Play Store. Just search ‘doppel - set your pace’. The doppel app is compatible with Android (5 or later) iOS (5 or later). Related articles Do I need a smartphone to use doppel? How will I know if doppel is for me? I am sensitive to nickel. Can I wear doppel? Is doppel waterproof? There aren’t any screens or buttons, how do I control doppel? Comments 0 comments Please sign in to leave a comment.