Huawei’s Watch D2 is still on sale at a discount until stock runs out. The D3 costs £399.99 compared with the D2’s current £350, and both share the same core mechanism: a genuine inflatable cuff built into the strap that measures blood pressure by compressing the wrist artery rather than estimating it from a pulse waveform. Huawei hasn’t claimed any accuracy improvement between the two. The full Huawei Watch D3 review tests that accuracy against an Omron arm cuff on four people. The real question is whether the D3’s software additions and slimmer build are worth £50 over a discounted D2, or whether the D2 does the one job that matters just as well for less.
The core measurement hasn’t changed
Both watches use the same oscillometric principle, the same clinical-style cuff compression, and the same sensor category: differential pressure sensor paired with optical heart rate. If cuff-based accuracy is the entire reason you’re buying either watch, that reason applies equally to both. The D3 isn’t a more accurate blood pressure monitor than the D2. It’s a more comfortable and more feature-rich way of doing the same measurement. Independent evidence exists for that shared mechanism: a 2025 study in Hypertension Research found the D2 met the AAMI/ESH/ISO Universal Standard, both against a mercury sphygmomanometer at rest and against a cuff-based ambulatory monitor over 24 hours. The D3 has not yet had an independent study of its own.
Where the D3 genuinely adds capability
Three things are new on the D3 that the D2’s specification page doesn’t offer at all, not refinements of existing features but capabilities that don’t exist on the D2. A dedicated pre- and post-exercise blood pressure mode checks your BP before a workout and again within two minutes after, something the D2 has no equivalent for. Pulse Wave Arrhythmia Analysis gives A-fib alerts via the PPG sensor, working alongside a separate Beat-by-Beat ECG app you activate by holding the side electrode for 30 seconds, a more deliberate heart-rhythm feature set than the D2’s single ECG sensor offers. And a Health Community feature shares real-time blood pressure, heart rate, step count and sleep alerts with family members, useful if you’re monitoring an older relative’s readings remotely rather than just your own.
The D3’s 24-hour ambulatory monitoring also follows European Society of Hypertension interval guidelines directly, targeting at least 70 percent successful readings across 20 daytime and 7 night-time measurements, with user-adjustable intervals and quieter night inflation. The D2 runs ABPM too, but without that stated guideline compliance or the adjustable, quieter implementation.
Where it’s genuinely just comfort, not capability
The case drops to 11.3mm from the D2’s 13.3mm, with the strap narrowing to 25.5mm from 26.5mm. Bluetooth moves to 6.0 from 5.2. None of this changes what the watch measures or how well it measures it; it changes how it feels to wear one for 24-hour monitoring, and whether the phone connection is more modern. If comfort during extended wear matters to you, particularly overnight ABPM sessions, this is a real reason to prefer the D3. If it doesn’t, it’s not.
Battery life is identical
Both watches quote up to 6 days of typical-use battery life, falling to 1 day with 24-hour ABPM enabled. The D3’s case is thinner, and Huawei states a 75-minute full charge time for it, a figure not given for the D2, but the underlying battery performance hasn’t moved despite the size change.
The decision, plainly
Buy the discounted D2 if you want cuff-based blood pressure monitoring and nothing else matters: the accuracy is the same, and you keep £50, D2 is a cheaper direct alternative to the D3 in that scenario. Buy the D3 if you’d actually use the pre- and post-exercise mode, the arrhythmia analysis tools, or the Health Community family sharing feature, since none of those exists on the D2 at any price. The slimmer case and updated Bluetooth are real but secondary; they’re worth having, not worth paying for on their own.
Full specifications for both models: Watch D3 and Watch D2. The Huawei Watch D3 review has the tested accuracy figures and the current Huawei Watch D3 price. For the D3’s full launch details and UK pricing: Huawei Watch D3 Launches: Slimmer Design, UK Pricing Confirmed.
Huawei Watch D3
Real cuff blood pressure in a slimmer watch, with a pre- and post-exercise BP mode and a 60-second Health Glance check.
Huawei Watch D2
Micro-pump inflatable cuff, 24-hour ambulatory blood pressure monitoring. Measures pressure directly, no optical calibration required.
Quick answers
Is the Huawei Watch D3 more accurate than the D2 for blood pressure?
No. Both use the same cuff-based oscillometric mechanism and the same differential pressure sensor. Huawei has not claimed any accuracy improvement; the D3’s changes are in software features and case comfort, not measurement accuracy.
Is the Huawei Watch D2 still worth buying at a discount?
Yes, if cuff-based blood pressure monitoring is the only feature you need. The core measurement is identical to the D3. You lose the pre/post-exercise mode, Pulse Wave Arrhythmia Analysis, and Health Community sharing, none of which exist on the D2 at any price.
What does the Huawei Watch D3 add that the D2 doesn't have at all?
A dedicated pre- and post-exercise blood pressure mode, Pulse Wave Arrhythmia Analysis for A-fib alerts, a separate Beat-by-Beat ECG app, and a Health Community feature for sharing health alerts with family members.
Is battery life better on the Huawei Watch D3?
No. Both watches quote up to 6 days of typical use, falling to 1 day with 24-hour ABPM enabled. The figures are identical despite the D3’s thinner case.
Is the Huawei Watch D2 blood pressure accurate?
At rest, the independent evidence says yes. A 2025 study in Hypertension Research found the D2 met the AAMI/ESH/ISO Universal Standard against a mercury sphygmomanometer at rest and against a cuff-based ambulatory monitor over 24 hours. The study did not test readings taken during or straight after exercise.
Last Updated on 30 September 2026 by tfk the5krunner
Small things I always use
- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
- Body Glide: The blue anti-chafe stick swimmers and runners carry. I use it.
- Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
- Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
- Maurten: Race fuel that stays easy on the stomach. I use them.
- Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
- Injinji: Toe socks that stop rubbing, so you run more. I use them.
- Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
- TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
- G8 insoles: Adjustable insoles that are good. I use them.
- Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.
Watches and sensors
- Polar H10: My daily driver for waking HRV.
- Polar Verity Sense: My backup arm-worn HR sensor.
- Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
- Train.Red: The best muscle oxygen sensor I’ve used.
- Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
- Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
- Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.
- Garmin Fenix 9 Pro: I’ve just bought one.
On the bike
- Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions.
- Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
- Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
- Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
- Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
- Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
- Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID
