Wearables & Sauna

Is wearing wearables in a sauna like bringing sand to the beach? Not quite. Sand won’t exceed its operating limits. I took the Garmin Fenix 8, Whoop MG, and Oura Ring 4 into three ~100 °C sauna sessions. What did they measure—and does wearing them in a sauna make any sense?

💍 Ultrahuman Ring PRO Announced: First Impressions, Price, Discount Code, and What We Still Don’t Know

On February 27, 2026, Ultrahuman unveiled the Ultrahuman Ring PRO – the third generation of its smart ring. It promises up to 15 days of battery life, new hardware, and a PRO Charging Case included in the box. What do we know, what don’t we know yet, and is upgrading from the Air worth it?

Oura Symptom Radar — Am I Getting Sick? And What Actually Helps?

I hate being sick — so I’m testing whether smart rings can detect an approaching viral infection earlier than my own symptoms. I looked at Oura’s Symptom Radar, compared the data, and used SciSpace to separate science-based interventions from “I heard it from someone.” Which habits actually work?

Elonga, Amazfit, Polar a Whoop – which one is the most accurate?

In this article, I compare optical heart rate measurement in screenless bands from Elonga, WHOOP, Polar, and Amazfit against a chest strap with ECG-level accuracy. Same exertion, same methodology, same conditions. Or are they? And is it even possible to simulate the same conditions?

Ultrahuman Home & Air – What’s New

Ultrahuman is trying to connect bedroom environment data (like CO₂, noise, and light levels) with biometrics from the Air smart ring. The new Ambient Sleep Score aims to highlight how your sleep might be affected by your surroundings — though its interpretation still has some rough edges.

🎄 Christmas 2025: Smart rings deals

Let’s be honest. Most “Christmas deals” are recycled Black Friday leftovers. But you still get some nice deals.

RingConn – can it tell when I’ve got a headache? New app updates!

Great battery life, unique sleep-apnea detection, compact design — that’s the RingConn Gen 2. And now the app has landed a very welcome update in version 3.13. VO₂ Max tracking, a new “Health Trends” view… and one big question: can the optical sensors really help track your circadian rhythm?

Best Smart Ring: AI 🤖

AI is becoming a big part of our lives and has now reached smart rings too. In this article, I compare 9 devices – from Whoop and Oura to Amazfit Helio – and their AI features like chatbots, personalized tips, or blood test analysis. Is there potential?

🔥 Black Friday 2025: Best Smart Ring & Wearable Deals

If you’ve ever been tempted to buy a smart ring, now’s the perfect time. I haven’t seen smart rings go on sale like this before. Seriously.

Ultrahuman Ring PRO – What to Expect from the Next-Gen Smart Ring

Ultrahuman has confirmed a new generation of its smart ring called the Ultrahuman Ring Pro. The trademark is already registered. It may bring NFC payments, new sensors, and a redesigned look.

Job interview vs. Oura, Garmin and Whoop? And what about the Limitless Pendant?

I arrived at the interview wearing my wearables – Garmin, Whoop, Oura, and the AI pendant Limitless. All detected stress, each differently. The highest peak? Garmin: 99/100 right in the middle of the talk. Which one told the truth? And what does the LLM say?

📦 Omni Ring Unboxing – The Slimmest Smart Ring Ever?

Omni Ring enters the smart ring market with a focus on AI and nutritional guidance. It promises a unique Energy QI metric similar to Garmin’s Body Battery, a charging case, and one month of premium subscription. But how does it compare to the holy trinity — Oura, Ultrahuman, and RingConn? Let’s see!