Which Apple Watch Should You Buy? SE 3, Series 12 or Ultra 4

Apple sells three Apple Watch lines after its September 9, 2026 event: the $249 SE 3, the $399 Series 12 and the $799 Ultra 4. Most iPhone owners should buy the SE 3. The Series 12 earns its extra $150 for the health sensors and the nicer watch; the Ultra 4 only for multi-day battery, diving and satellite.