India, Oct. 12 -- No spoiler alerts or unnecessary complications: the biggest upgrades in the Apple Watch Series 12 and Watch Ultra 4 are the ones you cannot see. Powered by a new health-sensing architecture, a 5-second-interval optical heart rate sensor, Siri AI, and the S10 silicon chip, the beating heart of the puzzle delivers a substantial leap for the overall experience while keeping a familiar exterior design.

Some people loudly called for a new design, but to be fair, there was no pressing need. Materials have changed a bit again, and you'll like the new colour options, too. While we are on that point, the Watch Series 12 is available in Aluminium (Dark Bronze photographed above is a favourite), Titanium (I'd recommend Natural) an...