Your iPhone might be keeping an eye on you while you are sleeping. Apps that ask for your permission while you use them might be responsible for sharing your personal data to many third-party companies. Read more at newshub.co.nz
The data collected is further sold out to companies which is used by them to target people with advertisements. The time when these trackers get activated is usually around the night or while you charge your phone.
One way to in which the tracking can be controlled is through the 'Limit Ad Tracking'.
The other way is wherein users can turn off the 'Background App Refresh' in order to stop trackers from tracking the data overnight.