boAt Wave Call 3 Review: A Big Screen and Bluetooth Calling on a Budget
1.83-inch display, BT calling, IP68, heart rate and SpO2. Here is which of those hold up and which need reading carefully.
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Wearables
Smartwatches and fitness bands, and how to tell a useful one from a spec sheet.
Water Resistance Ratings on Wearables and Earbuds, Explained
IP68 and 5ATM are not two ways of saying the same thing. One is about dust and splashes, the other about depth — and neither covers hot water.
SpO2, ECG and Blood Pressure on Budget Watches: What the Numbers Mean
Health features sell wearables, and the gap between what they measure and what they claim is widest at the budget end. Here is what each one is really doing.
Smartwatch or Fitness Band: Which One You Actually Need
The two have converged enough that the decision comes down to three practical questions rather than a feature list.
Smartwatch Battery Claims and How to Read Them
A watch advertised at 14 days will often need charging twice a week once you switch on the features you bought it for. The gap is predictable.
Samsung Galaxy Watch 7 (44mm, LTE) Review: What the Premium Buys
Dual GPS, sapphire glass, 5ATM and a regulator-grade ECG. This is where the specification list stops being marketing and starts being hardware.
How Accurate Is a Wrist Heart-Rate Sensor?
Optical wrist sensors are good at some things and unreliable at others, in a pattern that is entirely predictable once you know how they work.