https://techcrunch.com/2019/09/20/tonic-launches-a-personalized-news-reader-that-respects-user-privacy/

Personalization technology can lead to better experiences as it allows apps to customize their content for each individual user. But it can also chip away at user privacy. A company called Canopy wants to change that. It has developed a personalization engine that works without requiring users to log in or even provide an email. Instead, it uses a combination of on-device machine learning and differential privacy to offer a personalized experience to an app’s users. Now it’s demonstrating how this works with the launch of the news reader app, Tonic.

The new app is designed to be completely private, while also learning what you like over time, in order to offer a customized experience. But unlike other personalization engines, all the raw interaction and behavioral data stays on your own device. That means the company itself never see it, nor does any content provider or partner it works with, it says.