Apple has released iOS and iPadOS 13 beta 4 to registered Developers. iOS 13 brings lots of changes including but not limited to a Find My a combined Find my iPhone and Find my Friends, Dark Mode, Memoji characters for iMessage for older devices, Voice control and much much more.
For registered developers, iOS 13 beta 4 and iPadOS 13 beta 4 are available to download and test, right now. Simply go to the Settings app –> General –> Software Update and following the onscreen instructions. This update comes after Apple releases a revised beta 3 last week after the iPhone 7 and 7plus were left out of the original beta 3.
We are still waiting for Apple to seed the fourth beta of watchOS 6 and tvOS 13 to developers. OTA updates can be found here.