Got kids? If you do, this is a tip to follow. Bryan M. Wolfe on how to manage Screen Time limits for kids (only on iOS 13.3):
Among the new features in the latest iOS and iPadOS release is the “specified contacts” option in Screen Time, which lets you further limit who your children can communicate with during downtime and after app limits have become exhausted. Meanwhile, during Allowed Screen Time, you can now choose “everyone” or “contacts only” for who can communicate with your kids. The setting prevents unknown contacts from trying to communicate for added peace of mind.
Getting better with every release.