If you download apps to your Android of iPhone device, you should be aware that both Google and Apple have been known to overcharge users who pay to download apps as well of those who make in-app purchases in the Google Play store or in Apple’s App store.
Did you know Facebook has been paying people to install a “Facebook Research” app on their smartphones that lets the company follow all of the user’s phone and web activity? This app is similar to Facebook’s Onavo Protect app that Apple banned in June 2018 due to privacy violations.
If you have FaceTime on your Apple device you may want to disable it. A bug was recently discovered that potentially lets callers eavesdrop on people they were calling even though the recipient didn’t pick up the call.