Apple Watch Ultra 4 arrives with AI Siri and privacy-focused audio features
Apple unveiled the Apple Watch Ultra 4 on September 9, introducing a new S11 chip alongside redesigned health sensors and AI-powered capabilities. The watch offers extended battery life, now lasting up to 45 hours during outdoor workouts in low-power mode, and delivers more frequent heart rate and heart rate variability measurements. A major feature addition is Apple Intelligence-powered Siri AI, which brings conversational capabilities and personal context understanding to the wrist. Alongside Siri come new Audio Intelligence features including Siri Recap, which summarizes conversations without storing audio recordings, Live Rewind to recall the last 15 seconds of speech as text, and Sound Recognition for accessibility. Apple emphasizes privacy protections through on-device processing in a hardware-isolated Secure Exclave on the S11 chip. The watch maintains its $799 price point and will support the new features via watchOS 27. Pre-orders began immediately with availability set for September 18.
Key facts
- Apple Watch Ultra 4 price: $799 (unchanged from Ultra 3)
- Battery life: up to 45 hours in low-power extended workout mode, 18 hours continuous GPS tracking
- Heart rate readings: every 5 seconds (60 times more frequent than Ultra 3)
- Heart rate variability measurements: every 15 minutes (24 times more frequent)
- S11 chip enables on-device Siri AI and Audio Intelligence features
- Siri Recap and Live Rewind arriving in beta in late 2026
- Audio processing occurs in hardware-isolated Secure Exclave; raw audio is deleted immediately
- Pre-orders began September 9; general availability September 18, 2026
Limits of this briefing
No distinct left-leaning, right-leaning, or explicitly conservative outlets covered this story with political framing in available results. Coverage is primarily from centrist tech publications, which typically emphasize product specifications and technical privacy mechanisms without partisan perspective. Broader privacy debates around wearable surveillance may emerge as real-world usage patterns develop.
Sources
- Apple Newsroom: Apple unveils Apple Watch Ultra 4 Centre
- Bloomberg: Apple Takes on AI Wearables With Always-Listening Watch Features Centre
- Fast Company: New Apple Watch AI features hint at how Apple plans to address privacy concerns Centre
- TidBITS: Apple Watch Series 12 and Ultra 4 Add Health Sensing and Audio Intelligence Centre
- Wareable: Apple Watch Ultra 4 lands with boosted battery life and revamped sensor Centre