I've been living with the Apple Watch Series 2 for well over a month now and have tried to embrace Apple's new device. As a runner, I've temporarily ditched my TomTom Spark 3 GPS watch to see how the Apple Watch Series 2 works for runners.
But while app support and battery life have left me underwhelmed, I've been blown away by is how quickly the Series 2 picks up a GPS signal. Apple promised seconds and it really is that quick. There's no waiting around whether you're in a built up city or out in the countryside. You wake up the Watch, go to the Workout app, select outdoor run and you're ready to go.
So how does the Series 2 make it so easy to get out and run? I've been doing a bit of investigation to understand exactly how it all works.
Tracking from high up in the sky
The first place to start is to understand exactly what happens when your standard GPS running watch tracks your activity. We're talking about what the likes of Garmin, Polar and TomTom do to map your outdoor pursuits. We've covered this comprehensively in our how does GPS actually work explainer, but in its most basic form, it's to do with satellites pinging microwave signals to GPS receivers, which take this data and use triangulation to determine your exact location.
Along with GPS there is also a rival system known as GLONASS, which appears in most top end Garmin watches alongside GPS like the Fenix 3 HR. It uses 24 Russian Aerospace Defence Forces satellites to determine your location. To improve reliability and accuracy of GPS tracking, many wearables pack in both receivers.
GPS tracking on Apple Watch Series 2
But anyone who's used a Garmin, TomTom or Polar GPS watch knows that waiting for a signal is part-and-parcel of going for a run. And the experience can be frustrating. So how does the Apple Watch Series 2 deliver those speedy GPS signal pick up times?
Well, there's a GPS antenna that lies beneath that rectangular body, but it has a couple of other tricks up its sleeve to improve accuracy.
The first is taking advantage of the built-in Wi-Fi receivers. When the GPS is struggling to pinpoint your position, the Series 2 uses the Wi-Fi support to seek out wireless hotspots to identify your location.
But that's not all, it also taps into locally stored satellite data, and combines with the GPS and Wi-Fi data, to figure out your location before you start running. It's all very impressive.
Out in the field (or on the pavement)
I've spent a good deal of time testing the Series 2 against running watches from Garmin, Polar and TomTom and the Apple smartwatch wipes the floor with those established names for the speed in which it can pick up a GPS signal. When you head back to the Activity app on your iPhone, mapped data is on the money as well.
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Right now, the third party running app support for harnessing that location data is not all that great on the Series 2, but the good news is that developers are already working to take advantage of the built-in GPS on the Series 2 to enhance standalone Apple Watch apps. That means that data will soon be pulled into the likes of RunKeeper and MapMyRun. Strava is just one of the companies that has confirmed it is working on a new Strava Apple Watch app, which is expected to drop in 2017.
So there you have it, that's how the GPS tracking on the Apple Watch Series 2 works. If you have any other questions for us, let us know in the comments section below.
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