Withings Steel HR Sport hybrid smartwatch

Withings Steel HR Sport

What’s the downside of a smartwatch? Why, having to keep the thing charged up of course. Every couple of days, maybe. Some smartwatches manage to make it all the way up to five or six days. Except for the Withings Steel HR Sport hybrid smartwatch. It’ll run for up to 25 days per charge. And that’s with it displaying the time, all the time. No need to shake your wrist, it’s always there.

And that means, despite my tendency towards low-battery-anxiety, I’m happy to sit here with the Withings Steel HR Sport reporting a mere 35% of charge on its battery. Normally I’d be getting quite agitated by now. I’m relaxed because I last charged the watch at least a fortnight ago, so I’m confident it’s not going to run down on me for a while yet.

Withings Steel HR Sport Features

How does the Withings Steel HR Sport manage this feat? Why, by going old-school for much of its functionality. You see, in the topsy-turvy world of 2019, some mechanical devices consume less power than some electronic devices.

The Withings Steel HR Sport has an old-fashioned electrically powered movement with real hands that go around the dial. And that uses very little power. Remember how you’d go years between changing the button cells on your watch?

Withings Steel HR Sport

The smart display sits on the dial just below where “12” would be were it printed on the watch face. This display in a little circle that measures around 12mm across.

The watch face is dark grey. The hands are lighter grey with red tips. I found it a little hard to read, so for we older types, the white-faced version is probably the better choice. Another option is Withings Steel HR (ie. the non-Sport model), which is also available with a white face. The only other obvious differences are that the non-sport model doesn’t calculate a “Fitness Score”, and it’s a bit cheaper.

At the bottom of the dial is another small dial with a red hand. This one is also electro-mechanical. This dial indicates your daily progress towards your step goal. Very analogue!

The watch is rather stylish. It doesn’t even look like a smart watch. The frame is steel. The body is 13.25mm thick and the whole thing, band included, weighs 57.5 grams. There is a range of bands of different materials. The review one had a dark grey silicone band that was far more flexible than the norm. I loved it.

Withings Steel HR Sport

Withings Steel HR Sport smart stuff

As you can see from the name, the Withings Steel HR Sport tracks your heart rate as well as measuring steps and using the GPS on your phone to track its location. It uses the Withings Health Mate app to do the tracking for you, but it can hold a fair bit of data internally if it is separated from your phone for a while.

That said, I’d suggest you keep your phone fairly handy and keep the app running in the background. The watch can reflect notifications on your phone, but only if the app is going. Likewise, the GPS tracking isn’t going to work without the connection.

And if you don’t have it syncing on the fly, then when it does reconnect it can take a long, long time to upload the data. I must have rebooted my phone a week or so ago and not restarted the Health Mate app. So this morning when I reconnected, the sync took at least ninety minutes, with it seemingly restarting several times.

You can set which exercises you want to track – all the usual stuff including workouts, cycling, walking and even swimming. The watch is rated for up to fifty metres immersion, not that you’d do that. But you’re fine swimming normally with it.

You invoke exercise mode by holding down the single button control on the watch – it’s where the watch crown would be on a regular watch – then single press to cycle through the exercises. You can sort out which exercises you want and their order in the app.

Very slow sync if you don’t have the app running for a while (left); it’s cute turning the app dial and watching the hands move (right)

Withings Steel HR Sport modes

When you’re in exercise mode, the little circular display is on all the time. Single button presses cycle you through heart rate, calories burnt, duration and so on. When the Withings Steel HR Sport is not in exercise mode, the little display is off. You bring it to life with a button press, and again you can cycle through a few different things.

Of course, all the time the regular hands just keep on keeping the time. They move in one notch jumps – for example, once per minute for the minute hand – they don’t cycle continuously.

Setting the time was a bit of fun. Of course you do that through the app, as with all other settings. The app presents a circle and you use that to set the three hands in turn to the upright position. It’s kind of cool seeing the hands rotate under the control of the app. When you’ve done all three, you tap “Next” and the hands jump instantly to the time shown on your phone, which ought to be the correct time.

Overall I found the app a bit flaky. Often the GPS tracking would be only partially complete. There’s the very slow syncing I mentioned earlier. And it seemed to slow down some other apps, making them slow to open and operate.

But you don’t really need to use the Withings Health Mate app, except for setting up. Now the Withings Steel HR Sport watch works with the very popular Strava app.

GPS tracking a little unreliable: stopped halfway through my walk (left); tracked me well for the first half of a bike ride (bottom right) but not on the ride back (top right) (but perhaps that’s because I forgot to mark the end of the session for a couple of hours)

My heart rate

I’m starting to wonder if there’s something about my wrist that makes it hard for heart rate trackers to take an accurate count of my pulse. A couple of months ago I reported how, when I was on an exercise bike that showed my pulse, a smart watch over-estimated my heart rate considerably.

Well, much of the time the Withings Steel HR Sport underestimated my heart rate considerably. I followed the instructions about having the watch the right distance from my wrist bone. Then I’d be cycling away with the machine showing, say, 120 beats per minute. But the Withings Steel HR Sport would be reporting 87bpm.

(What if it was right and the exercise machine was wrong? I did several pulse counts and confirmed that it was indeed the exercise machine that was correct.)

That would be one day. Then the next it would work fine.

I struck upon the idea that perhaps I could put the watch the other way around so that it’s HR sensor was pressed against the underside of my wrist. That worked like a dream … the first time. But the next time it was back to underestimating. It was inconsistent like that. Way off then on, then off again.

It turns out that this is not a new phenomenon.

So, as always, take the heart rate reading with a nice chunky grain of salt. And likewise, do not bank too heavily on downstream measures, such as calorie burn since these probably use heart rate as part of their input data.

Withings Steel HR Sport


The Withings Steel HR Sport smart watch is an attractive device, perfectly fine for tracking the usual range of exercise. The recently added Strava support means you don’t even really need to use the sometimes problematic Withings Health Mate app.

And I just have to love that three-plus week battery life. (A further note on that: I wrote this article more than a week ago and let the draft marinate until I was ready to finish it off. The Withing Steel HR Sport was sitting on my desk throughout that time, unused, since I had another smartwatch to check out. And now the battery is down to 25% from the 35% it was a week ago. Impressive!)

The Withings site for this smartwatch is here.

Value for money
Ease of use
Exceptional battery life
Great band
Heart rate monitor accuracy could be improved
App could be improved