Apple Watch Ultra 4 Launches in India With S11 Chip, Redesigned Health Sensors, and Extended Battery

Apple has officially unveiled the Apple Watch Ultra 4 in India, introducing a redesigned Health Sensing System, the custom S11 chip, and a heavily extended battery architecture. Targeting extreme athletes and power users, the flagship wearable integrates on-device machine learning directly on the wrist through watchOS 27, encased in a 100% recycled 3D-printed titanium chassis.

Health Sensing and Vitals Tracking

The Ultra 4 overhauls its biometric monitoring via upgraded optical and electrical sensors driven by the new S11 silicon.

• Continuous Heart Rate & Recovery HRV: Larger, power-efficient green LEDs measure heart rate passively every five seconds. Heart rate variability (HRV) sampling is now 24 times more frequent, splitting data into two distinct metrics: Recovery HRV (for evaluating daily physical strain) and Overall HRV (for tracking broader cardiovascular health).

• Daily Readiness Score: Sourced from the Apple Heart and Movement Study, this new 0–10 metric evaluates recent activity, training load, sleep, and vitals to provide actionable daily recommendations ranging from “Recover” to “Go For It.”

• Daytime Vitals & Pedometer: A Daytime Vitals view monitors physiological shifts during waking hours. Additionally, a new machine-learning pedometer model drastically improves indoor distance estimation and step-count accuracy, supported by a dedicated on-screen complication.

Audio Intelligence and Hardware-Isolated Privacy

Leveraging the S11’s Neural Engine and Apple Intelligence, the Ultra 4 introduces heavy on-device audio processing capabilities.

• Sound Recognition: The watch can now directly identify critical ambient noises – like sirens, alarms, or a crying baby – sending immediate on-wrist alerts for deaf and hard-of-hearing users.

• Live Rewind & Siri Recap: A double press of the Digital Crown displays a 15-second text snippet of the preceding speech (signaled by an audible chime). Siri can also generate post-conversation summary bullets natively in the app.

• Secure Exclave Processing: All audio analysis occurs within a hardware-isolated Secure Exclave on the S11 chip. Raw audio is immediately purged, speaker identity is ignored, and all stored summaries remain end-to-end encrypted.

Battery and Tracking Modes

Power efficiency scales dynamically based on the chosen tracking mode, with a 15-minute quick charge yielding 18 hours of typical use.

Complete Specifications

Pricing and Availability

Pre-orders are currently live in India, with in-store retail availability commencing on Friday, September 18, 2026.

PFD Context:

Apple’s strategy with the Watch Ultra 4 is heavily focused on reclaiming the high-end endurance market from dedicated sports wearables like Garmin and Coros. The introduction of the “Daily Readiness Score” and “Recovery HRV” directly targets the metric-heavy training analytics that serious athletes have historically had to seek outside the Apple ecosystem. At ₹1,09,900, it remains prohibitively expensive for casual users, but the integration of the S11 chip’s Audio Intelligence – specifically the Live Rewind feature via the Secure Exclave – turns the Ultra 4 into an unprecedented accessibility and productivity tool. With 84 hours of battery in Low Power Mode and an incredibly aggressive 15-minute quick charge, the Ultra 4 is slowly eliminating battery anxiety as a valid reason to choose a traditional digital sports watch over an Apple Watch.

Tags: Apple Watch Ultra 4 launch, Watch Ultra 4 India price, Apple S11 chip, Recovery HRV, watchOS 27, tech news India 2026