MacRumors published a story that Apple has released the fourth beta of watchOS 10 to registered developers.
Apple Seeds Fourth Beta of watchOS 10 to Developers
Apple today seeded the fourth beta of an upcoming watchOS 10 update to developers for testing purposes, with the software update coming two weeks after the third beta.
To install the watchOS 10 update, developers will need to open the Apple Watch app, go to the Software Update section under "General" in Settings, and toggle on the watchOS 10 Developer Beta. Note that an Apple ID linked to a developer account is required.
