https://thenextweb.com/apple/2019/09/20/the-messy-ios-13-rollout-shows-apple-needs-a-revised-release-schedule/

iOS 13 is finally here. The big addition this time around is the system-wide dark mode, and much-needed refinements to apps like Maps, Photos, and Reminders.

Then there are the new security and privacy features that alerts you about the apps that use your location, and those that want to access your Bluetooth. Safari even packs in a few more anti-tracking features that make it difficult for ads to track you across the web.