Samsung Galaxy Watch9 review

The Galaxy Watch9 is the most feature-dense watch for Samsung phone owners. Samsung Health on the watch adds an Energy Score each morning, Bedtime Guidance built from three nights of sleep data, sleep apnea features, a Heart Health Score and an Antioxidant index, and the Fitness Index combines VO2 max, body composition, heart rate and activity into a training score. Google Gemini is built in and listens when you raise your wrist, with no wake word. The sapphire crystal display reaches 3,000 nits, so notifications stay readable in sun, and Samsung moved to a 390 mAh battery, up from 300 mAh on the two previous generations. Because it runs Wear OS, the Google Play Store is available for extra apps. The catch is compatibility: many of these features need Android 13 or later, several need a Galaxy phone, and it does not work with iPhone. At $429.99 it also costs more than the Pixel Watch 5, which keeps it just behind on value.

Who it is for

Samsung Galaxy phone owners who want the most health features inside the Samsung Health app.

Price

From $429.99 for the 40mm model at Samsung's US store when checked.

40mm $429.99 44mm $459.99
Quoted from the vendor pricing page on November 8, 2026.

Key features

• Sapphire crystal display with up to 3,000 nits of brightness
• Energy Score, Bedtime Guidance and sleep apnea features in Samsung Health
• Heart Health Score and an Antioxidant index
• Google Gemini built in, triggered by raising the wrist
• Wear OS with the Google Play Store; LTE model for calls without the phone

Strengths and weaknesses

• Strength: Larger 390 mAh battery than the Watch7 and Watch6
• Strength: Fitness Index coaching uses VO2 max, body composition and activity data
• Strength: Bright sapphire screen is easy to read outdoors
• Weakness: Many health features need an Android 13 phone, and some need a Samsung Galaxy phone
• Weakness: Does not pair with iPhone
• Weakness: Samsung's product page does not detail payment support, so check your bank before buying

Key facts

• Price: $429.99 (40mm), $459.99 (44mm)
• Phone needed: Android; several features need Android 13 and a Galaxy phone
• Battery capacity: 390 mAh
• Display: Sapphire crystal, up to 3,000 nits
• Software: Wear OS with Google Play

Where it ranks

Samsung Galaxy Watch9 is No. 4 in our Best Smartwatches verdict.