Privacy Policy document is a requirement of Google PlayStore, to enable use if Camera.
In the application, the user can use camera (photo or gallery) to add pictures on a Ad, or for his own profile (avatar). This pictures are stored in P2P network (decentralized way). See subproject gchange-pod for additionnal informations.
Where my Ads (or profile, comments, etc.) are stored ?
Gchange use a P2P network (see gchange-pod to store each emitted documents in a decentralized way. The document owner can delete any emitted document, but be aware that a node administrator can ignore deletion, and choose to keep this data.
So consider that your issued documents are on the permanent web.