The Apple Watch Series 11 is Apple's most capable health smartwatch — adding hypertension notifications for the first time, alongside ECG, Blood Oxygen, sleep apnea detection, and the thinnest Apple Watch design to date.
Key Specs
- Case sizes: 42mm / 46mm
- Case materials: Aluminum (Rose Gold, Silver, Jet Black, Space Gray) or Titanium (Natural, Gold, Slate)
- Display: Wide-angle Always-On Retina, up to 2,000 nits, brighter when viewed at an angle, Ion-X glass (2x more scratch-resistant than Series 10)
- Chip: Apple S10
- Water resistance: 50 meters (ISO 22810:2010), IP6X dust resistant
- Battery: Up to 24 hours / Up to 38 hours in Low Power Mode / 8 hours from a 15-minute fast charge
- Connectivity: GPS, or GPS + Cellular with 5G
- Sensors: Two heart sensors, wrist temperature sensor, blood oxygen sensor, gyroscope, accelerometer
- Compatibility: iPhone 11 or later with iOS 26 or later
The headline feature is hypertension notifications — a first for any smartwatch. Series 11 uses its optical sensor to analyze how blood vessels respond to each heartbeat over 30-day periods, detecting patterns that may indicate chronic high blood pressure. The feature was developed across studies totaling more than 100,000 participants and validated in a clinical study. If a notification comes through, you can set up a blood pressure log in the Health app on iPhone to share a report with your doctor.
The full health suite goes further than any previous SE or budget Apple Watch: the ECG app generates a single-lead electrocardiogram to check for signs of AFib, the Blood Oxygen app takes on-demand and background readings day and night, and sleep apnea notifications monitor breathing disturbances over time. The Vitals app pulls overnight heart rate, respiratory rate, wrist temperature, and sleep duration into a single morning summary, flagging if multiple metrics fall outside your typical range. Cycle Tracking adds retrospective ovulation estimates using wrist temperature data from overnight wear.
The wide-angle Always-On Retina display is 2x more scratch-resistant than Series 10, staying visible from more angles and sharper in direct sunlight at up to 2,000 nits. Apple's thinnest watch design to date means it's comfortable enough to wear through the night without noticing. On the fitness side, the refreshed Workout app puts Pacer, Race Route, and Custom Workouts at the four corners for one-tap access, Training Load shows recovery needs over time, and Workout Buddy — powered by Apple Intelligence from a nearby iPhone — delivers real-time personalized audio motivation mid-session.
Safety features include Emergency SOS, Fall Detection, Crash Detection, Check In, Backtrack via the Compass app, and Medical ID accessible from the lock screen. 5G cellular lets you call, text, stream music, and pay with Apple Pay without needing your iPhone nearby, with improved antenna architecture for better coverage in weak-signal areas.
Genuine unit, sourced through verified channels, with manufacturer warranty. Same-day delivery in Nairobi, 1–2 days countrywide, M-Pesa or cash on delivery.
