Extracting data from other third party android app without API

I am trying to make an android application that fetches data from another app’s storage. For example, the latest three profile pictures if the user has Facebook app installed, or the last few audio messages sent by the user to a contact in WhatsApp, or articles user recently pinned on Pinterest.

Is it possible?

PS: I’m aware of the graph API for Facebook, but I want a more “universal” solution that works around the storage used by the app.

Source: facebook

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