Apple Watch Series 4

Launched on September 12, 2018, the Apple Watch Series 4 signaled a departure from the layout aesthetic of the Apple Watch Series three in desire of a bigger but thinner smartwatch, one which furnished all of the center capability of the unique with a few new capabilities.

AppleInsider reviewed the version rapidly after its launch and gave it a rating of four.five out of five.

The Apple Watch Series five changed it while it released in 2019. The Apple Watch Series 6 then took the vicinity of the 2019 version upon its arrival in September 2020. The Apple Watch SE now sits in a brand new mid-ranged spot subsequent to the Apple Watch Series three, which lives on as a price range choice.

Apple Watch Series 4 capabilities

External Design

While sharing the identical layout language because the Apple Watch Series three, the Series 4 complements the idea through choosing large displays. Still the usage of a rectangular OLED Retina show with Force Touch, the 38mm and 42mm sizes had been upsized to 40mm and 44mm variations.

The resolutions are 324 through 394 pixels withinside the 40mm model and 368 through 448 pixels withinside the 44mm, with each able to generating 1,000 nits of brightness. The display screen alternate to an side-to-side layout additionally effects in a show that’s over 30-percentage large than the preceding fashions, at the same time as nonetheless minimizing the bodily effect of supplying extra display screen area.

The 44mm fashions are 38mm extensive and 44mm excessive, with a intensity of 10.7mm. The 40mm variations are 34mm extensive, 40mm excessive, and once more with a intensity of 10.7mm.

Despite the alternate in length making them barely large, bands made for in advance fashions will hold to suit the Series 4.

As usual, one facet capabilities the Side Button and Digital Crown, utilized in live performance with the faucets and swipes of the principle show to transport through watchOS. Apple refreshed the Crown over again to reveal a hoop as opposed to a coloured dot, with the black model used to indicate the GPS version at the same time as crimson indicates the inclusion of mobile connectivity.

The Digital Crown acquired a mechanical improve in addition to a visible one, with it gaining haptic feedback.

For audio, the audio system had been redesigned to be 50% louder, with the microphone moved to the alternative facet to decrease echoes.

Around the lower back is the alternative massive outside alternate for the version, with Apple refining the optical coronary heart sensor to a 2nd-technology model. The sensor basically capabilities the identical manner, shining mild into the consumer’s wrist to look for a pulse in a way referred to as photoplethysmography, however in preference to taking the shape of 4 circles, there’s rather one essential circle with a unmarried primary port for mild.

In phrases of substances and finishes, the Apple Watch Series 4 shipped in aluminum with silver, gold, and area grey finishes for each GPS and Cellular variations, together with a chrome steel choice with polished silver, gold, and area black alternatives for Cellular fashions.

The Apple Watch Edition choice changed into deserted for a 2nd time, with the formerly sold ceramic choice now no longer to be had to buy for this iteration. Instead, all fashions of the Series 4 have ceramic backs.

However, Apple offered Nike+ variations in silver and area grey aluminum, whole with different Sports Bands and Loops, together with Apple Watch Hermes in a sophisticated chrome steel. Both versions covered different watch faces.


Apple’s subculture of enhancing its merchandise through the years keeps with the Apple Watch Series 4 the usage of the S4 processor, a 64-bit chip with two times the overall performance of the S3 used withinside the preceding technology. This lends itself to walking apps smoother than before, in addition to launching stated apps quick.

Along with the processor alternate is an improve to the three-axis gyroscope, with its having two times the dynamic variety than formerly offered, at as much as 32G. Apple additionally converted to the W3 wi-fi chip, which allows Wi-Fi connectivity over 802.11n 2.4GHz networks and Bluetooth aid.

No adjustments had been made to the garage potential from the Series three, with customers capable of take benefit of sixteen gigabytes, permitting a few song to be stored.

Battery lifestyles is rated at as much as 18 hours of usage, aleven though in the long run this relies upon on how customers absolutely rent the wearable tool every day.

Other onboard factors consist of GPS, GLONASS, Galileo, and QZSS aid, a barometric altimeter, water resistance to 50 meters, an ambient mild sensor, and aid for each Apple Pay and GymKit.


The largest function of the Apple Watch Series 4 is the inclusion of an electrocardiogram characteristic, or ECG. The first purchaser tool to be had over-the-counter to provide the function with U.S. Food and Drug Administration approval, customers are capable of use the ECG app on their Apple Watch to quick take a look at the reputation in their coronary heart, past the pulse.

Users have to whole a circuit through touching the Digital Crown with a finger from the arm that isn’t carrying the Apple Watch, with the rear coronary heart tracking sensor array being the second one factor of touch. After 30 seconds, the Apple Watch gives an instantaneous studying of whether or not it detects a sinus rhythm, symptoms and symptoms of atrial fibrillation (AFib), or an «Inconclusive» result.

Regardless of what the Apple Watch advises, the total recording from the studying is obtainable withinside the connected iPhone Health app, with the delivered choice to percentage it with a medical doctor or different fitness expert as a PDF.

Unusually for an introduced marquee hardware function, the ECG app wasn’t to be had at release, with customers having to attend till Apple delivered aid in a later software program update. In the United States, the function changed into component of watchOS five.1.2, at the same time as different markets had longer waits.

The delays had been in all likelihood because of Apple having to searching for regulatory popularity of every promote it desired to provide ECG capability, with its handiest turning into to be had as soon as granted.

Since its introduction, the ECG characteristic has been credited with probably saving the lives of many customers. Numerous reviews have surfaced in which customers had been alerted to symptoms and symptoms of atrial fibrillation, prompting a go to to their ordinary physicians and in addition scientific help in a few cases.

Irregular Heart Beat and Fall Detection

A function delivered on the identical time because the ECG however additionally usable on older Apple Watch fashions is abnormal coronary heart notifications, in which the Apple Watch warns if the consumer’s pulse is surprisingly excessive or low for 10 mins or longer.

The prolonged dynamic variety of the accelerometer additionally allows a characteristic for detecting if the consumer has fallen over, inclusive of slips, trips, or even vehicle accidents. Once a fall is detected, the Apple Watch will try to get a reaction from the consumer, and if configured to do so, may be set to alert emergency offerings and the emergency touch to the event.

Both the abnormal coronary heart notifications and fall detection may be enabled and disabled through the consumer.

watchOS 5

To go together with the release of a brand new smartwatch version, Apple delivered watchOS five on September 17, 2019.

Along with fall detection for a few older Apple Watch fashions, in addition to Series 4 aid and up to date watch faces to take benefit of the bigger displays, watchOS five’s maximum handy new function changed into Walkie Talkie. After connecting Apple Watches collectively through the app, customers can open a line of conversation in a comparable manner to the radio-primarily based totally gadgets of the identical name, with messages robotically gambling aloud at the recipients’ model.

To inspire activity, a function permits customers to installation competitions with others, with development in some of regions monitored through the years to decide the winner in a week-lengthy contest. Throughout the week, individuals can see the alternative’s development, giving them extra of an possibility to capture up if they may be behind.

Automatic exercising detection can alert a consumer to a detected exercising if one is sensed to be ensuing, however now no longer manually triggered. The function is capable of offer credit score for current exercising carried out if a exercising is confirmed, in preference to beginning from scratch at that moment.

Apple Podcasts had been delivered to watchOS withinside the launch, with customers capable of request podcast playback through Siri. Third-birthday birthday celebration apps had been additionally enabled to play history audio for the primary time.

Siri additionally received the cappotential to cause if the consumer increases their wrist to their face. This saves having to apply the «Hey Siri» verbal prompt, which can be of use in a few conditions which includes the ones in which the man or woman wishes to be especially quiet.


The standard disassembly of the Apple Watch Series 4 through iFixit confirmed Apple made many adjustments to the inner shape of the tool, inclusive of new buttons and a thinner show. Other additives had been optimized for area, which includes the Taptic engine being smaller however longer.

The barometric sensor changed into relocated in the speaker grille, ensuing in its now no longer having a separate hollow as proven at the Series three.

Despite the case being about 6 percentage thinner than before, the battery is barely higher-potential, developing from 1.07 watt-hours withinside the Series three to 1.113 watt-hours.

While battery replacements had been deemed to be «quite straightforward,» the Apple Watch Series 4 changed into given a «repairability» rating of 6 out of 10, because of display screen replacements being «tough however doable,» using tiny tri-factor screws, and the direct mounting of flex cables to the S4 system-on-chip. Most board upkeep had been deemed «impossible.»

Apple Watch Series 4 Pricing

Preorders for the Apple Watch Series 4 started on September 14, 2018, with shipments from September 21. The GPS and Wi-Fi version began out from $399, at the same time as the Cellular versions began out from $499. The Nike+ fashions began out from $399, and the Apple Watch Hermes began out from $1,249. It is now no longer on the market through Apple.

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