Check what sensors your apps are using
This one will get your attention. When you download an app it will usually ask you to approve it having access to as many of the sensors on your phone as possible, even if the app doesn’t need them all, just to leave the app developers some wiggle room for the future. They may use that wiggle room and choose to start selling some of the data to third parties. You can now have a look at what you’ve agreed to in the past.
Apple’s update now lets you have a look at what you have agreed to in the past. Go to Settings, Privacy and turn On the Record App Activity setting to start compiling the new App Privacy Report. This eye-opening report gives you a record of what’s been going on for the last seven days. You will see how many times each app that you said ‘Yes’ to has accessed your microphone, camera, photos, contacts or location. Ask yourself “does that gambling app really need access to my microphone?” Try turning off as many permissions as you can where it just doesn’t seem right that they have that access. When you use the app again it will likely ask your permission ‘to access the microphone’ but you will be thinking more clearly in that moment about why they need permission, and whether you are in the mood to grant it.
Try it out and see what you find that surprises you and makes you feel uncomfortable. Some changes you make will feel like you are taking back control of your phone.