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The user has to be informed at some point that the application monitors the user actions and transmits them to a measuring system. Furthermore, the user must be informed that he has the possibility to switch of the tracking in the application and can contradict this way. (see: ~anja:Opt-Out CIM - Mobile App Sensor Documentation Version 1.1.0 (English Version))
For this purpose, you can include data privacy information in your language into an appropriate place of your app implementation:
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