A personal newsletter documenting one author's self-experiments with wearable data, including HRV tracking, heat running and the development of their own recovery app, Nunc. It reads as a first-person lab notebook that questions the value of commercial recovery metrics.
Website: https://zulusierra.co/
A tester wears multiple smart rings, straps and watches side by side over many nights to check how accurately they measure heart rate, HRV and sleep. The newsletter also covers the psychology of over-relying on sleep scores, such as orthosomnia, and helps readers decide which devices are worth trusting.
BTTR Reviews is an Australian tech review newsletter covering consumer gadgets such as smart home cameras, doorbells, and AI glasses. Readers get hands-on reviews and launch coverage with practical notes on battery life, privacy, subscriptions and local pricing.
A personal recovery journal from a writer rehabilitating after a stroke, framing the process through Daoist Dragon and Tiger philosophy, Welsh landscape and autoethnographic method. Readers get reflections on wearables, recovery metrics, hardware choices and the theory behind the project.
David Imel, a technology reporter and YouTube camera enthusiast, writes personal, first-person commentary on tech hardware, including Leica cameras, the Fitbit Air fitness band, and the history and social reception of smart glasses. Readers get informed opinions and hands-on impressions of gadgets from a writer who blends reviews with reflections on his own habits.
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