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Norwegian government to set 15-year age limit for using social media
(www.euractiv.com)
This is a most excellent place for technology news and articles.
What I meant was that the phone operating system has SDKs (e.g. google services on android) which the app uses to make sure it hasn't been tampered with, which makes it even harder to make an open source client.
It's the opposite of supplying an SDK for third party developers.
Or even run the app as is on a "non-compliant" os - like a rooted android.