Apple Watch Ultra 4
The frozen lake at dawn, the summit at 4 a.m., the dive at 40 meters — the Ultra 4 shows up to every outing where a regular watch would have already tapped out.
View on Amazon →Built for extremes
Designed for mountains, diving, and intense training — not just the walk to the subway.
Battery life built for long outings
The kind of battery reserve that lasts a full day outdoors, not just an afternoon at a desk.
Advanced sports tracking
The metrics a serious athlete or outdoor enthusiast will actually check after the effort.
Who is it for?
For those who push battery life and toughness to the limit — sport, outdoors, diving — and for whom a standard watch simply can't keep up.
What to know about Apple Watch Ultra 4
Apple Watch Ultra 4 is Apple's most rugged watch, announced on September 9, 2026 and available since September 18. This page links to the GPS + Cellular 49mm Natural Titanium Case with Sand Trail Loop (S/M) on Amazon.ca.
Apple Watch Ultra 4 vs 3: Apple highlights longer battery life, faster charging and a new Health Sensing System. Heart rate is measured every five seconds, heart rate variability up to 24 times more often, and a 0–10 Readiness score helps pace training. Battery life reaches up to 50 hours of normal use, 84 hours in Low Power Mode and up to 25 hours in Extended Workout mode (25% more). Fifteen minutes of charging gives up to 18 hours.
Built for the outdoors: a 49mm Grade 5 titanium case (about 63 g), a flat sapphire crystal display up to 3000 nits, 100 m water resistance, recreational scuba diving to 40 m (EN13319), IP6X and MIL‑STD 810H testing. Dual-frequency GPS improves accuracy, especially in cities, and satellite communications (Emergency SOS, Messages, Find My) are free for two years with activation.
Strengths and limits
Strengths
- Up to 50 hours of battery (84 hours in Low Power Mode)
- Recreational diving to 40 m, 100 m water resistance
- Dual-frequency GPS and satellite communications
- Titanium and sapphire, MIL‑STD 810H tested
Limits
- 49mm and about 63 g — big on a small wrist
- Requires iPhone 11 or later with iOS 27 — no Android support
- Cellular needs a compatible plan from your carrier
- Satellite is free for two years only and not offered in every country
Before you buy
- Check the band size: this link is for the Trail Loop S/M; pick M/L if needed.
- Ask your Canadian carrier about a cellular watch plan.
- Confirm your iPhone is an iPhone 11 or later that supports iOS 27.
- In the box: the watch, band and a 1 m USB‑C magnetic fast charger cable.
- Check today's price on Amazon.ca.
FAQ
Apple Watch Ultra 4 vs 3: what's new?
Per Apple, Ultra 4 adds the new Health Sensing System (heart rate every five seconds), the Readiness score, the S11 chip, up to 50 hours of battery and fast charging of 18 hours in 15 minutes.
What is the Apple Watch Ultra 4 battery life?
Apple rates it at up to 50 hours of normal use, 84 hours in Low Power Mode and up to 25 hours in Extended Workout mode.
Is Apple Watch Ultra 4 good for diving?
It is rated for recreational scuba diving to 40 m under EN13319, and water resistant to 100 m for swimming and high-speed water sports.
Sources: Apple's official tech specs for Apple Watch Ultra 4 (apple.com/ca, accessed September 2026); Apple press release, September 9, 2026.
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