This killer app of the new Watch is the cellular service, so don't scrimp on that £70 and go for that version. The Watch itself is ready for this function it seems, but perhaps that's not the case for the telecoms providers – or provider.

Cellular service; S3 dual-core processor; comparable battery performance

Cellular setup; signal strength indoors; no playing nice with third-party services

This killer app of the new Watch is the cellular service, so don't scrimp on that £70 and go for that version. The Watch itself is ready for this function it seems, but perhaps that's not the case for the telecoms providers – or provider.

Cellular service; S3 dual-core processor; comparable battery performance

Cellular setup; signal strength indoors; no playing nice with third-party services

Smartwatches are one of those things where not everyone needs but secretly they do want one. Sure, it's nice to have a smartwatch but it just eliminates just one less step of pulling out your phone.

Lightweight; Comes in a variety of case and band options; Nice display; Watch is super quick; Siri on the Apple Watch is a nice addition; Good selection of watchfaces to choose from

Battery life hasn't increased from previous models; Can be pricey depending on what bands/case you choose; Getting around watchOS 4 is a bit convoluted; LTE connectivity is limited to two carriers

Earning the top score of the group, the Apple Watch Series 3 netted the Editors' Choice award and the title of Best Smartwatch for iPhone users

Loaded with smart functions; great display; extremely easy to use

Not a great battery life; pricey; Not a great battery life; pricey

Apple has been developing electronic masterpieces for a decade and devices right from the iPhone to the iMac have been around as proof. While most are standalone devices that perform tasks designed for a particular purpose, the Watch is something that is more of an add-on, an extension to the...

since I bought this watch 3 weeks ago, I'm glad I got the one I did...the sapphire glass that comes with the more expensive stainless steel is worth the extra money in my opinion..it is very scratch resistant...check out consumer reports testing on this watch..

Update: The Apple Watch Series 4 has been released and it's a belter, bringing a new design and more advanced health and fitness features. Read our Apple Watch Series 4 review to see which smartwatch is for you.

Leaves rivals floundering; Cellular a worthy addition; Plenty of design options; Great for general fitness

We want even more battery life; Restricted network choice

The Apple Watch 3 and the Samsung Gear 3 Frontier are proof that the Samsung vs Apple rivalry has transcended the smartphone area and it continues on the realm of smartwatches as well, but, this relatively new market has proven to be a lot more difficult to enter and the competition a lot more...

Even though the cellular variant of the Apple Watch Series 3 looks identical to the previous model, it does more than any smartwatch can do today. It gives you the freedom to not be tied to your smartphone and enjoy your workout without any distractions.

Can make phone calls independently; Can stream music without using an iPhone; 50-meter water resistance; Arguably the best fitness watch you can buy

Battery life falls short with heavy cellular usage; Needs to be recharged every night

The Apple Watch is a great compliment to my iPhone and is good at tracking my physical activities. I love the fact that I can wear it in the pool or in the shower. I also like how it links all of my vital stats to the Apple Health app. The battery life is phenomenal.