Apple has added a number of awesome and much-needed privacy features to iOS 13, and one of the best is the way the operating system informs you about apps that are tracking your movements.
How does it do this? Via a popup, like this:
This gives you the option of either allowing the tracking to continue in the background, or to only allow tracking when you are using the app.
This is a very handy privacy feature, and can float to the surface apps that you may have forgotten about, but that haven’t forgotten about you!