Fourth beta of watchOS 4 for Apple Watch seeded to developers

Apple today released a fourth beta of watchOS 4 (build number 15R5331g) to its registered developers and members of the Apple Developer Program.

The company’s Beta Software Program is currently unavailable for watchOS, meaning public beta testers enrolled in the program won’t be able to take watchOS 4 beta 4 for a spin.

The full watchOS 4 beta 4 installer can be downloaded from Apple’s Dev Center portal.

To install watchOS 4 beta 4 on your wearable device over the air, tap My Watch → General → Software Update in the companion Watch app on your paired iPhone. Your iPhone must be on iOS 11 beta 4 in order to download the new watchOS update.

TUTORIAL: How to switch from watchOS beta to public release

Furthermore, your Apple Watch must be connected to its paired iPhone, have at least 50 percent power and be placed on its magnetic charging disk to install watchOS 4 beta 4.

The previous beta, seen in Andrew’s hands-on embedded below, includes bug fixes, new animations, icon tweaks and, you guessed right, many new bugs.

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watchOS 4 brings more intelligence and fitness features to Apple Watch.

There are three new watch faces in watchOS 4 to choose from, including a Toy Story face, a dedicated Siri face that displays dynamic information based on your habits and other data, plus the new Now Playing and Apple News complications.

The Workout app has built-in music playback controls and supports calisthenics workouts.

Thanks to Apple’s partnership with leading equipment makers, Apple Watch will interface with dedicated gym equipment to share data like your heart rate while using equipment data like steps taken to more accurately calculate calories burned and more.

New monthly challenges in the Activity app take advantage of intelligent coaching and tailored workout encouragement to keep you motivated.

watchOS 4 will release for public consumption this fall for all Apple Watch models.

If you find noteworthy feature changes in watchOS 4 beta 4, do reach out to us via Twitter or drop us a message at and we’ll update the article.