Paige Leskin’s article about location tracking is a bit misleading. She mentions that Apple keeps a detailed location list of every place you’ve visited. Which is false, because Apple doesn’t know anything about your location. Your iPhone does though, but that data doesn’t get sent to Apple unless you specifically opt in to send analytics to Apple. This is more than semantics, because your data staying on your iPhone is the foundation of Apple’s privacy stance. If you go to Settings > General > Privacy > Location Services, you can tap on the blue text at the top that says “About Location Services & Privacy.” This section clearly states “This data is encrypted and stored only on your device and will not be shared without your consent.” And if you did consent to share it with Apple, you’re probably not worried.
Apple tracks and stores where you’ve been and how often (and when) you visit. But it gets even more detailed than that: Your iPhone compiles locations specific to a single address and tracks when you leave there and even how long it took to get there and by which mode of transportation.