https://www.cnet.com/news/google-android-p-will-stop-your-apps-from-sneakily-using-camera-mic/

When installing a new app, you have to click "accept" to give the program access to your location, camera and microphone. That unlocks a lot of potential in your apps, but it also opens up the question of when exactly those apps are collecting your data. 

Until now, it's been hard to know the answer on phones use the Android operating system, made by Google.