The differences between the Apple Watch S7, S8, and S9 may include the following:
First, processors and performance are likely to improve with each generation, making the new ones faster and smoother.
Second, the new model may introduce more health and fitness features, such as blood oxygen monitoring, electrocardiogram and so on. In addition, the new model may have a larger screen, higher resolution and longer battery life.
Finally, there may also be changes in terms of design and appearance, such as a thinner and lighter body, new strap options, etc. In short, each generation of Apple Watch will undergo certain upgrades and improvements in performance, features and design.
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The chip is different: The apple watch7 uses a dual-core S7 SiP chip with a 64-bit dual-core processor and also has GPS, compass, all-weather altimeter, second-generation speaker and microphone capabilities.
The apple watch series 8 features an S8 chip with a 64-bit dual-core processor, a built-in lithium-ion rechargeable battery for up to 18 hours, and a USB-C magnetic fast charging cable.