As with just about everything these days, display matters quite a bit. In a lot of ways, the wearable segment has display requirements similar to the smartphone space. However, unlike the smartphone space it isn’t necessarily critical to have the highest possible resolution, and it isn’t necessarily crucial to have perfect color calibration as in most cases wearables won’t be used for color-critical applications.

In the interest of addressing this, for the near-term we’ll continue to use the standard smartphone workflow, but I hope to expand the testing done here as wearables develop. For now, we’ll continue to do the standard brightness and accuracy testing, but I’ve removed the grayscale test as it strongly emphasizes gamma accuracy. Although it is important to not have obscenely incorrect gamma curves, wearables generally have to prioritize readability over dynamic range, which means that near-black colors would be brightened to try and overcome background reflectance. Similarly, we won’t be placing dE2000 average error in our Bench comparison tool or in graphs, as something like the Apple Watch cannot have controlled display brightness.

As a result, we can’t really be 100% sure that gamma tests and other tests of luminance are actually accurate when automatic brightness means that any inconsistency in light to the sensor will affect display brightness, which will strongly affect dE2000 results.

In the case of the Apple Watch, the display is interesting because this represents the first AMOLED display to ever be used in an Apple product. As far as I can tell, this is an LG OLED display with an RGB subpixel arrangement, but it isn’t quite the same as a traditional RGB stripe. I suspect that for the near future we will continue to see the use of this subpixel arrangement as the resolution of the Apple Watch doesn’t really allow for a PenTile layout. Given the current state of AMOLED (as evidenced by the Galaxy S6) I believe it is effectively the future of mobile displays, and it seems that whoever makes these decisions at Apple agrees as well.

As I mentioned in the start of this section, the Apple Watch also doesn’t have any way of manually setting brightness. You get approximately three choices of auto brightness algorithms, which bias the brightness curve of the display appropriately.

In practice, I didn’t actually care that manual brightness was gone on the watch because I never actually used manual brightness on the iPhone or any phone that has at least a halfway decent auto brightness system. In every phone I’ve ever used, the only time I use manual brightness is when the auto brightness system is clearly programmed wrong in some shape or form. Common cases where this would happen include auto brightness that didn’t actually set the display to maximum brightness in daytime or wouldn’t set the display to minimum brightness in absolute darkness.

Thankfully, the default auto brightness setting on the Apple Watch doesn’t have any of these problems, although for reasons unclear minimum brightness changes depending upon the brightness setting that is selected. As a reviewer though, it would definitely help if the watch had a manual brightness setting for more precise display testing and battery life testing. I’m sure that the precision of the digital crown would allow for precise brightness settings as well, but I suspect that this would have some very real potential to affect practical battery life as I’ve seen more than one person walk around with their smartphone display permanently set to maximum brightness because of reasons.

There’s also the issue of reflectance, which could be a problem given that the two higher-end models use a sapphire crystal glass on the display instead of traditional hardened glass. I did notice that reflectance is much higher than something like the iPad Air 2, but I never really felt like the reflections completely washed out the display. The reflections also indicate that the watch has a properly laminated display, without issues involving index of refraction mismatch. However, if people are worried about outdoor visibility Apple Watch Sport should be better given the use of more common aluminosilicate glass. I’m not sure if Apple has actually loaded different auto brightness algorithms for the Apple Watch/Watch Edition compared to the Watch Sport to try and compensate for this though, and I suspect such a change would be difficult to test for as well.

Although reflectance is one aspect of outdoor visibility, the other is display brightness. This is probably the only aspect of the Apple Watch where I can get consistent and repeatable results. Unfortunately, given that we haven’t actually done any other full-featured wearable reviews I’ll have to reference smartphones to get a good comparison point. As the Apple Watch display is already quite small, we won’t be able to get accurate APL vs brightness readings as it’s impossible to hold the meter in a repeatable position that isolates ambient light while also holding an LED to the display.

At any rate, the Apple Watch gets respectably bright at around 460-470 nits, although not quite the ridiculous 600 nits that the Galaxy S6 can achieve. At this full white display, I recorded a color temperature of 6891K, and 6883K at the ~100 nits that was used for the remainder of display testing. It’s important to keep in mind that these values are only at 100% white, so this isn’t the average color temperature that we normally list in reviews. Of course, this display’s contrast is also infinite, with no visible residual brightness on pure black images.

Saturation Sweep

Moving on to the saturation test, we can see that Apple has put a huge amount of effort into calibrating these displays, which is somewhat surprising given that one might expect wearables to not be all that critical when it comes to color accuracy. In my experience, I never actually bothered looking at photos on the watch outside of the messaging app and Twitter. I suspect that this was done in order to make it so that images look the same across all Apple devices, as something would seem “off” in most photos taken by an iPhone 6 if displayed with an Adobe RGB gamut. In this test, the dE2000 average error was 2.33, and as one might guess from the photo above most of the error was concentrated in blue, which appears to have some gamut issues as the native gamut appears to be wider than sRGB but not enough to completely cover sRGB.

GretagMacbeth ColorChecker

The GretagMacbeth ColorChecker test reveals a similar surprising level of attention to detail in color calibration. Color accuracy isn’t quite on par with the very best, but given that this is a first generation product I’m really surprised that the display is already receiving this much attention with an average dE2000 error of 2.42. Overall, this means that the display has relatively little perceivable error for sRGB content, which is the standard almost across the board, although wider gamuts like Rec. 2020 or Adobe RGB may one day supplant sRGB.

Overall, I’m impressed with the quality of the display of the Apple Watch. The AMOLED panel could probably reach a 600 nit max with sufficient progression in emitter technology from LGD, but I suspect this will take some time. The calibration is also incredible for a first-generation wearable, and the use of a full RGB subpixel helps to avoid a lot of the aliasing issues that tend to plague PenTile or other RG/BG subpixel arrangements at these relatively low pixel densities.

The reflectance of the sapphire lens on the display is a bit high and could probably benefit from anti-reflective coatings of some sort, but given that I haven’t had to worry about scratching the display thus far it’s probably a fair trade as a screen protector will usually increase reflectance noticeably. It’s also a bit annoying as a reviewer to not have manual brightness settings, but as an end user I never felt the need for manual brightness as the auto brightness algorithm works quite well.

Ultimately the entire user experience around the display in every aspect is well-executed, although there is still room for improvement on the technology side of things.

Apple Pay and WatchOS Final Words Battery Life, Charge Time, Taptic Engine, and Misc. Thoughts


View All Comments

  • sachouba - Wednesday, July 22, 2015 - link

    Still, if you had reproached the Apple Watch with anything, you wouldn't be able to get your hand on any Apple product anymore.

    You've not even compared the Apple Watch with Samsung's smartwatches, which have a better display, way better battery life, and so on.

    Keep worshipping Apple, you're the only website which finds the Apple iPhone 6 has a better battery life than the Galaxy S5, which is obviously not true...
  • twanto - Monday, July 20, 2015 - link

    Another idiot who knows nothing about photography. They didn't take these photos with an iPhone..... some people still buy real cameras with real lenses, no surprise here: IT'S A TECHNOLOGY WEBSITE! Reply
  • Lord of the Bored - Tuesday, July 21, 2015 - link

    " bokeh added"

    Ayup, that's totally what it is. Definitely not because close-up photos have less depth-of-field than distant ones(as a loose rule). It's totally 'shopped to add the cool word for out-of-focus backgrounds.
  • dsumanik - Tuesday, July 21, 2015 - link

    Actually bud i am an accomplished photographer myself, Mr. Ho was using a d7000 shooting the 35mm dx prime wide open. I own a d7100 and same lens, i recognized it right away....i used the phrase 'bokeh added' to troll a reaction and it worked.

    The bottome line is that the photos are enhanced, the only way to prove otherwise would be to post the original RAW files, not jpegs. There is nothing wrong with enhancing photos for your article, but claiming you didn't when you did just proves how far you are willing to go to lie about the silliest detail.

    Heres the bottom line:
    - they presented the product in question in the most positive light possible
    - the article was meandering and incoherent and 100% opinion based - but overall positive
    - can someone link me a negative apple product review written by anandtech, ever?
    - has every apple product, 100% of the time, been perfect?
    - if the apple watch is so awesome, why did the reviewers never own one until this review?
    - how many people wear a watch perfectly draped over thier wrist
    - why were there so many unboxing shots?
    - Mr. Smith did not answer my questions of whether or not scathing apple product review that went viral would be good for his website and career as a whole.

    Ill tell yah why, apple wouldnt be very happy with mr smith writing a crappy review of thier product, and there would be repurcussions to his career because of it,

    And that my friends is exactly the problem.

    This website has become a huge commercial, as with a large majority o the internet and i will continue to embarass and troll authors of this kind of junk whenever possible,

    Like i said, just call a turd a turd..

    ...the watch sucks dudes, its not a maybe, it sucks...go look for yourself.
  • Samus - Tuesday, July 21, 2015 - link

    I'm not an Apple person, but the iPhone 4S just happened to be the best smartphone I ever owned (except perhaps my HP\Palm Veer...I like small gadgets)

    Just like the Apple Watch is the best smartwatch I've ever had. The Pebble will always have a place in my heart as the first smartwatch I owned (unless my 1996 Timex Datalink counts?) but it is clearly outclassed by even competitively priced smartwatches (a LG G watch is $80 refurbished, the same price as a new Pebble, and the Pebble Time Steel is nearly as expensive as the Apple Watch)
  • dsumanik - Wednesday, July 22, 2015 - link

    high five, for you

    I'll wait till iWatch 3 or 4 thats has integrated LTE modem and actually allows me to jog without a phone.

    Like i said, this one still sucks, I've seen it, tried it, and it's overpriced (unsuprising from apple) and slow. Literally the only cool thing i can think of that it does is the wrist tap navigation, or the the tapping u get from sms ... would be good for unobtrusive communication in a meeting, or flirting with your girlfriend.

    Jobs wouldn't have allowed this.

    He would have waited another generation for the required technology, or engineered it himself.

    Even the most die hard apple lover has to admit that.
  • WinterCharm - Saturday, July 25, 2015 - link

    The butthurt is strong in this one.

    The apple watch is currently the *best* smartwatch out. There's a reason it has 75% market share of all wearables.
  • superflex - Tuesday, July 21, 2015 - link

    I guess you've never experienced a watch band pulling out hairs on your wrist then.
    I had one that would do that. I never wear it.
    Arm hair does matter.
  • JoshHo - Monday, July 20, 2015 - link

    If someone has been secretly shaving my arms, please let me know. Reply
  • Ryan Smith - Monday, July 20, 2015 - link

    I may have had Stephen replace your shower water with Nair... Reply

Log in

Don't have an account? Sign up now