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    Your Circular Ring just got a big health tracking update – for free

    Circular/ZDNETFrench smart ring brand Circular has launched its Immunity Index feature that could notify you ahead of your next cold. The feature, available on the smart ring’s app, uses health data the ring already aggregates, such as heart rate variability, resting heart rate, sleep-breathing regularity, and temperature stability, to predict strain on the body ahead of illness. Also: This subscription-free smart ring gave my Oura a run for its money (and it’s cheaper too)Immunity Index monitors these biomarkers to detect changes and raise a red flag if something’s awry. It rates your immunity out of eight, with eight out of eight meaning you’re in the clear, six out of eight meaning there are slight issues, four out of eight meaning you’re slightly vulnerable to sickness, two out of eight meaning advanced risk, and zero out of eight meaning you’re at major risk of illness. Users can couple the Immunity Index with the “Log Symptoms” feature to track their daily symptoms and feelings. Also: Finally, a smart ring I don’t have to charge every night (and no subscription)”With the Immunity Index, we’re shifting the health conversation from reactive to proactive,” Amaury Kosman, CEO and co-founder of Circular, said in a press release. “Our goal is to empower people with real-time insights so they can take small, smart actions before minor fatigue turns into full-blown sickness.” More

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    Eufy’s latest security camera has AI-powered color night vision – and no monthly fees

    Eufy Security Eufy has just upgraded its security device lineup to include two new home security cameras, both powered by artificial intelligence (AI). The new EufyCam E40<!–> and SoloCam E42 are joining the Eufy Security catalog to expand its local storage solutions. MaxColor Vision in 2K resolution With Eufy’s new MaxColor Vision, the EufyCam E40 […] More

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    10 ways true Linux power users get more out of the world’s best OS

    nadla/Getty Images Linux is powerful, flexible, and can do just about anything. However, to really get the most out of Linux and your computer(s), there are certain skills and habits you need to bolster; otherwise, you’re not really enjoying the riches that can be mined from Linux.  Also: 8 ways I quickly leveled up my Linux […] More

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    Most developers use AI in their daily workflows – but they don’t trust it, study finds

    fotograzia/Getty Images Programmers are using AI more than ever, but they don’t like or trust the tools very much, according to the 2025 Stack Overflow Developer Survey. The survey of almost 50,000 developers found that 84% now use or plan to use AI tools in their workflow, up from last year (76%). Over half of professional developers […] More