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macrumors bot
Original poster
Apr 12, 2001

The Apple Watch Series 8 has now replaced the Apple Watch Series 7 in Apple's smartwatch lineup, but how different are the two successive smartwatch generations?


In 2021, Apple unveiled the Apple Watch Series 7, including features like taller casing sizes with larger displays, slimmer bezels, improved durability, and faster charging technology. The Apple Watch Series 7 has now been discontinued by Apple, and as year-old models, prices at third-party resellers are falling. As such, some customers may be weighing up whether to upgrade to a Series 7‌ or a Series 8‌.

The Apple Watch Series 7 and Series 8 share the overwhelming majority of their features, so should you consider buying or sticking with the Series 7 to save money? This breakdown also serves as a way to see all the differences that the new Apple Watch brings to the table.


Apple Watch Series 7
  • S7 chip
  • Gyroscope and accelerometer
  • Third-generation optical heart sensor, electrical heart sensor for ECG, and blood oxygen sensor
  • Aluminum casing in Midnight, Starlight, PRODUCT(RED), Blue, or Green
  • Stainless Steel casing in Gold, Silver, or Graphite
  • Titanium casing in Titanium or Space Black

Apple Watch Series 8
  • S8 chip (Same CPU as S7)
  • More powerful gyroscope and high dynamic range accelerometer
  • Crash Detection
  • Optical heart sensor, electrical heart sensor for ECG, blood oxygen sensor, and body temperature sensor
  • Wrist temperature sensing during sleep
  • Cycle tracking with retrospective ovulation estimates
  • Aluminum casing in Midnight, Starlight, PRODUCT(RED), or Silver
  • Stainless Steel casing in Gold, Silver, or Graphite

Final Thoughts

Overall, the Apple Watch Series 8 is a very minor upgrade over the Series 7, with the body temperature sensor and Crash Detection being the only significant changes, meaning that it is difficult to recommend upgrading. Many Apple Watch Series 7 users will likely not be able to justify upgrading to the Series 8, but some customers coming from an older model could still have good reason to preference the latest models, namely those who do not have an iPhone 14 model with Crash Detection and women who want to take advantage of the cycle tracking features. The Apple Watch Series 8 is very similar to the Series 7, so customers who have an older Apple Watch model and are looking for an upgrade may prefer to look for a discounted Apple Watch Series 7.

Article Link: Apple Watch Series 7 vs. Apple Watch Series 8 Buyer's Guide: Should You Upgrade?
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macrumors regular
Aug 2, 2014
I’m still rocking the S4 - still have a good 83% battery, runs the latest OS and everything.

I’m looking to upgrade this year, but even for me, the newer sensors make no difference since I won’t personally use them. The thermometer/temp sensor would be the one to look for since it could come in handy.

But I have no issue sticking to the 4 until I see a good redesign or the battery doesn’t hold anymore.


macrumors member
Nov 10, 2021
…the watch should be in a 2 year cycle, not much innovation neither features, i might cop on series 8 though.
Lol I still have the Series 3

Still works great and they fixed the storage issue that was problematic for Watch OS updates

Does everything I need it for tbh

Plus I have tiny wrists and the 38 mm size (the smallest now is 41 I think but it shouldn't be a huge difference) is perfect for me


May 28, 2009
So it takes body temp and a longer battery blood sugar levels as was rumored earlier.

Nope, series 7 is fine still with me...maybe series 9.
yes, blood sugar level would be a game changer for for a large number of people. Worst case scenario for Dexcom.
But at least they've been too stupid (google servile) at Dexcom for years to link their good stuff to the Apple Watch without any detours. That weakens the grace with many people
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macrumors 6502a
Jun 19, 2006
My 4 is still working fine. There was a rumor about a hydration sensor a while back. If that's in the 8, I will upgrade for sure.
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macrumors 6502a
Jan 8, 2021
For whatever reason my eyes turned the bottom portion of the watch in the image orange.. An orange AW and iPhone would look interesting, as my favorite color. I've bought orange cases in the past but now that I go caseless.. I wonder how well particular iPod colors sold and whether they influenced iPhone color decisions back in the day
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