On iOS it uses the movement sensors, GPS, internet access and requests permission to show information on your log-on screen. That sounds purretty much necessary to me... anyways with Withings and Apple Health all your information is "clouded" anyways, namely to allow integration of other apps like "MyFitnessPal" which allows you to add your nutritions and keep a food line, or "Runkeeper" to record your workouts.
If you don't like it you can create a fake purrrofile under the name of "Oldwrench Smith"
