Tiffany Janzen on Instagram: "If the app is free… how does the company make money?! Here’s the part most people don’t realize: a lot of apps include third-party code called SDKs which is tiny bits of software that send that data to advertisers or analytics companies. Those “Allow tracking?” pop-ups? That’s what they’re about. All that info gets fed into machine-learning models that build a digital version of you … things like what you like, what you ignore, what you might buy next. Then advertis