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? There aren’t any screens or buttons, how do I control doppel? Does doppel come with a warranty? I have an anxiety disorder. Could doppel help me? Is doppel water resistant? Comments 0 comments Please sign in to leave a comment.