The táo Watch Series 4 signaled a change in design, including a new larger display, a faster processor, & the key addition of ECG monitoring, giving users more information about their heart health.

● 2018 flagship● Larger edge-to-edge display● size increases khổng lồ 40mm and 44mm● Faster S4 processor● Second-generation optical heart sensor● ECG functionality● Find great táo apple Watch deals● Discounted prices start at $359 is supported by its audience and may earn commission as an Amazon Associate & affiliate partner on qualifying purchases. These tiếp thị liên kết partnerships vày not influence our editorial content.

Launched on September 12, 2018, the táo Watch Series 4 signaled a departure from the thiết kế aesthetic of the apple Watch Series 3 in favor of a larger yet thinner smartwatch, one that provided all the chip core functionality of the original with some new features.

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The táo bị cắn Watch Series 5replaced it when it launched in 2019. The táo Watch Series 6then took the place of the 2019 modelupon its arrival in September 2020. The táo bị cắn Watch SE now sits in a new mid-ranged spot next khổng lồ the táo apple Watch Series 3, which lives on as a budget option.

While sharing the same thiết kế language as the táo bị cắn Watch Series 3, the Series 4 enhances the concept by opting for larger displays. Still using a square OLED Retina display with Force Touch, the 38mm và 42mm sizes have been upsized to 40mm and 44mm versions.

The táo apple Watch Series 4 has a bigger edge-to-edge display

The resolutions are 324 by 394 pixels in the 40mm version và 368 by 448 pixels in the 44mm, with both capable of producing 1,000 nits of brightness. The screen change to an edge-to-edge thiết kế also results in a display over 30-percent larger than the previous models while still minimizing the physical impact of offering more screen space.

The 44mm models are 38mm wide and 44mm high, with a depth of 10.7mm. The 40mm versions are 34mm wide, 40mm high, và again with a depth of 10.7mm.

Despite the change in form size making them slightly larger, bands made for earlier models will continue khổng lồ fit the Series 4.

As usual, one side features the Side Button và Digital Crown, used in concert with the taps và swipes of the main display khổng lồ move through watchOS. Táo apple refreshed the Crown once again khổng lồ show a ring instead of a colored dot, with the đen version used to lớn denote the GPS model while red signifies the inclusion of cellular connectivity.

The speakers were redesigned to lớn be 1/2 louder for audio, with the microphone moved to lớn the opposite side to minimize echoes.

Around the back is the other big external change for the model, with apple refining the optical heart sensor to lớn a second-generation version. The sensor fundamentally functions the same way, shining light into the user"s wrist to search for a pulse in a technique known as photoplethysmography, but rather than taking the size of four circles, there is instead one main circle with a single central port for light.

The new heart rate sensor is one large sensor instead of four smaller ones

In terms of materials & finishes, the táo bị cắn dở Watch Series 4 shipped in aluminum with silver, gold, & space gray finishes for both GPS & Cellular versions, along with a stainless steel option with polished silver, gold, & space đen options for Cellular models.

The táo bị cắn dở Watch Edition option was abandoned for a second time, with the previously sold ceramic option not available to lớn purchase for this iteration. Instead, all models of the Series 4 have ceramic backs.

However, apple offeredNike+ versionsin silver và space gray aluminum, complete with exclusive Sports Bands và Loops, and Apple Watch Hermes in polished stainless steel. Both variants included exclusive watch faces.

Apple"s tradition of improving its products over time continues with the táo apple Watch Series 4 using the S4 processor, a 64-bit cpu with twice the performance of the S3 used in the previous generation. This lends itself to running apps smoother than before and launching said apps quickly.

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Along with the processor, change is an upgrade to lớn the three-axis gyroscope, with its having twice the dynamic range than previously offered, at up to 32G. Táo bị cắn dở also switched over to lớn the W3 wireless chip, enabling Wi-Fi connectivity over 802.11n 2.4GHz networks & Bluetooth 5.0 support.

No changes were made to the storage capacity from the Series 3, with users able to take advantage of 16 gigabytes, enabling some music to lớn be stored.

Battery life is rated at up lớn 18 hours of usage, though ultimately, this depends on how users actually employ the wearable device each day.

Other onboard elements include GPS, GLONASS, Galileo, QZSS support, a barometric altimeter, water resistance lớn 50 meters, an ambient light sensor, and support forApple Pay and GymKit.

The biggest feature of the hãng apple Watch Series 4 is an electrocardiogram function or ECG. The first consumer device available over the counter khổng lồ offer the feature with U.S. Food and Drug Administration approval, users can use the ECG phầm mềm on their táo khuyết Watch khổng lồ quickly check the status of their heart, beyond the pulse.

Users must complete a circuit by touching the Digital Crown with a finger from the arm that isn"t wearing the táo Watch, with the rear heart monitoring sensor array being the second point of contact. After 30 seconds, the apple Watch provides a close reading of whether it detects a sinus rhythm, signs of atrial fibrillation (AFib), or an "Inconclusive" result.

The built-in ECG function uses the Digital Crown

Regardless of what the táo apple Watch advises, the full recording from the reading is offered in the connected iPhone Health app, with the added option to nội dung it with a doctor or other health professional as a PDF.

Unusually for an announced marquee hardware feature, the ECG app wasn"t available at launch, with users having to lớn wait until táo khuyết added support in a later software update. In the United States, the feature was part of watchOS 5.1.2, while other markets had longer waits.

The delays were likely due to táo bị cắn dở having lớn seek regulatory approval for each market it wanted to lớn offer ECG functionality, with its only becoming available once granted.

Since its introduction, the ECG function has been credited with potentially saving the lives of many users. Numerous reports have surfaced where users were alerted to signs of atrial fibrillation, prompting a visit to their regular physicians and further medical assistance in some cases.

A feature introduced at the same time as the ECG but also usable on older táo Watch models is irregular heart notifications, where the apple Watch warns if the user"s pulse is unusually high or low for 10 minutes or longer.

Fall detection can and has saved lives

The extended dynamic range of the accelerometer also enables a function for detecting if the user has fallen over, including slips, trips, & even car accidents. Once a fall is detected, the hãng apple Watch will attempt khổng lồ get a response from the user, & if configured to vì so, it can be set lớn alert emergency services và the emergency liên hệ to the event.

The táo apple Watch Series 4 has a small red ring on the Digital Crown khổng lồ signify cellular devices