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What changes from Apple Watch Series 3 to Series 4?

Of course, opinions vary widely, but there is some consensus, in the initial comments on today's launches, that the Apple Watch Series 4 pleased much more in terms of news than the iPhones Xr, Xs and Xs Max.

Not least: without a doubt, the jump from Series 3 to 4 was the biggest ever made by Apple in its watch, since the first generation. In the following paragraphs, you will know everything that has changed between them.

Apple Watch Series 4 stainless steel

If you look at a glance, you will find that the design of the Apple Watch has not changed. The basis is really the same, however:

  • The boxes go from 38mm and 42mm to 40mm and 44mm, respectively (but, fortunately, the current bracelets are all still compatible);
  • The thickness was reduced from 11.4mm to 10.7mm;
  • The microphone was moved from left to right, between the Digital Crown and the lower button (for better voice pickup);
  • With the repositioning of the microphone, the speakers occupy a larger area on the left side and are, according to Apple, 50% more powerful;
  • THE Digital Crown (now with haptic feedback) is no longer painted red in Cellular versions, now with a red circumference that, by the way, also exists in models with GPS but black;
  • The rear has changed a bit, as it brings the second generation of optical sensors together with the new electrode-based sensor for the ECG (I will talk more about that later), and now with ceramic with sapphire crystal in all versions;
  • As of now, we only have aluminum or stainless steel finishes (including a new golden version) because Apple killed the ceramic Watch Edition.

Obviously, not everything is static. With the increase of the boxes, we also had a considerable increase in the sizes of the screens themselves, which now come close to the edges of the watch. We went from 563mm to 759mm in the smallest model, and from 740mm to 977mm in the largest. Note a detail: the Series 4 40mm larger than the Series 3 42mm.

Comparison of Apple Watch cases

Thanks to these larger screens (35% more in the smaller version, 32% more in the larger version), Apple was able to create new exclusive displays for the Watch Series 4, as well as adding more complications in order to take advantage of the extra space. There are also new animations and effects in the interface that exploit the fact that the screen now goes close to the edges of the box.

Internally, we went from an S3 chip dual-core for an S4 dual-core which is now 64 bits according to Apple, up to 2x faster and we also got a new wireless chip W3, as well as Bluetooth 5.0. It also comes with an improved accelerometer and gyroscope that together now allow the watch to detect when a person falls (trip, slide, pass out) and can call the emergency number automatically. In addition, all models now have 16GB of internal capacity (before, models with GPS were only 8GB).

The new rear sensors have improved and enabled new cardiac monitoring, in particular an electrocardiogram (ECG). This novelty, however, will not be available immediately and will only reach the United States initially, as it depends on regulatory approvals from health agencies and, for now, Apple has only received endorsement from Food and Drug Administration American (FDA). In Brazil, the Apple Watch Series 4 will have to be evaluated in the future by the National Health Surveillance Agency (Anvisa).

ECG on Apple Watch Series 4

And who was excited about the Apple Watch Series 4?