The back-crystal sensor on an Apple Watch packs green, red, and infrared LEDs alongside a photodiode array.
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Inside Apple Watch ECG: how a single Lead I electrode becomes an
Inside Apple Watch ECG: how a single Lead I electrode becomes an FDA-cleared rhythm strip The Apple Watch ECG records…
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Apple Pencil Pro vs Apple Pencil USB-C on iPad mini 7: Barrel Roll Compared
By Zeina Haddad The decision between Apple Pencil Pro ($129) and Apple Pencil USB-C ($79) for the iPad mini 7…
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Inside AirPods Pro’s Head-Tracking Pipeline: How H2 Calculates Spatial Audio Position
In this post: What sensors does the H2 chip actually read? · How does orientation data become a change in…
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AirPods Max 2 Firmware 6E188 Adds USB-C Lossless at 24bit/48kHz Finally
Dated: March 22, 2026 — AirPods Max 2 firmware 6E188 A recent firmware update finally pulls the AirPods Max 2…
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Ultra 3 Depth App Freezes at 2.1m on watchOS 26.2 Build 24S320 Until Water Lock Cycles
On watchOS 26.2 build 24S320, the stock Depth app on Apple Watch Ultra 3 stops updating its depth readout the…
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Vision Pro 2 Battery Swap Teardown Shows Apple’s New Pentalobe Trap
The external battery pack is still the part of the Vision Pro that dies first, and with the second-generation headset…
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Booting iPhoneOS 1.0 in 2026: The S5L8900 Emulation Dream
I still have my original iPod Touch in a drawer somewhere. It's scratched to hell. The stainless steel back looks…
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iPhoneOS 1.0 on QEMU: Why We Still Care
I spent last weekend trying to revive a bricked iPod Touch 1G. Not the physical device—that poor thing's battery swelled…
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The iPod Touch’s Digital Afterlife: Emulating iPhoneOS 1.0 and Reviving a Classic
The Surprising Second Act for a Discontinued Icon In the ever-accelerating world of technology, devices are often forgotten Learn about…
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