&gt; He says this whole issue is mainly down to your phone number.<p>&gt; Facebook goes through your phone book ... you give it permission to do this when you install the app.<p>This is 100% demonstrably false. It literally comes down to advertising&#x2F;tracking.<p>Because tinder is ad-supported for the free app, they&#x27;re sending data directly to advertising networks (of which Facebook is one), and that&#x27;s being used to track you. Period.<p>On iPhones an app specifically has to ask for permission to read your contacts beforehand. There&#x27;s nothing &quot;implicit&quot; about that, you literally have to agree it explicitly.<p>I really wish the COO at a Security research company wouldn&#x27;t spew nonsense. And people wonder why the general public is misinformed as to the harm of advertisers&#x2F;tracking.