Which permissions are used under Android, and for what purpose?

Here is an explanation of the most important permissions that Threema for Android requires:

  • Read/write contacts
    Required for address book synchronization. If the synchronization is off, contact data is not accessed.
  • Camera
    Required for contact verification via QR code and for the built-in camera app.
  • Microphone
    Required for Threema calls and voice messages.
  • Location
    Used for the “Send location” feature.
  • Accounts
    Used for contact synchronization resp. integration into the account management of Android.
  • Modify or delete the contents of your USB storage
    Required for reading and storing media files (images, videos, documents).
  • Make and manage phone calls
    Required to reject incoming phone calls while a Threema call is ongoing.