Synchronization between the apps for iPhone and iPad is not possible due to their technical characteristics. Only Challenges will reflect and update your progress on both iPhone and iPad. That's why we recommend using the app on one of these devices.
The Health app is not available for iPads, for this reason, Step Tracker and Statistics features are not available on it. Though iPad, having a much bigger screen, is convenient when doing our Workouts.
So it is really up to you whether to choose iPhone or iPad for the app usage. You can use both, but please remember that your progress will not sync.
We do appreciate your kind understanding.
Feel free to reach out to us at any time at email@example.com for more information.