KL Techs

We may earn a commission from links on this page. Apple caught my attention with their claim that the Apple Watch Series 12 and Ultra 4 have the “most accurate heart rate in a wearable.” It’s hard to make a really accurate heart rate sensor, and in my experience, Apple hasn’t had a great track record in that area. So I tested the Series 12 pretty intensively over the past week or so, and now I have results. Apple Watch Series 12 (GPS, 42mm) $399.00 at Amazon Get Deal ...

We may earn a commission from links on this page. One of the big features Apple announced alongside the new Apple Watches is Siri AI—now available on your wrist! You need to join a waitlist to try Apple's new and improved chatbot , and since my turn just came up, I put the new on-wrist Siri through its paces. Here's how it went, and why I don't think the experience lives up to Apple's promises (yet, anyway). What devices have Siri AI?  Since Siri AI requires Apple Intelligence, you’ll need a device that supports it. Those include iPhones 15 Pro and newer, and an Apple Watch that is Series 9 or newer. If you want to use Siri AI on the Apple Watch, you need both a supported watch and a supported phone—a new watch and old phone won’t do the trick. With my phone and watch both on iOS 27 (the iOS 27.2 developer beta on the phone; watchOS 27.0 on the Apple Watch Series 12 ), I enabled Siri AI in my phone’s Settings app, which put me on a waiting...

We may earn a commission from links on this page. When I test smartwatches and fitness trackers, I place a particular emphasis on accuracy. Is my running pace correct? Does the device capture the ups and downs of my heart rate? I even got a VO2max lab test to check a bunch of watches' fitness scores. But one thing I never test for accuracy is calorie burn. None of my devices come close to agreeing on the number of calories they think I'm burning, and I don't expect them to. Even scientists who study the accuracy of wearables can't answer the question in a way that's useful when you're shopping for this year's devices—but we'll get into why that is below. There was a time, before Fitbits, when nobody knew quite how many calories they were burning on a daily basis. Sure, you could calculate a rough estimate based on your body size, sex, and age. You could choose whether or not to believe the calorie readout on the cardio machines at the gym. (You shou...

A VPN conceals your IP address by routing your internet traffic through a remote server, preventing anyone surveilling the network from tracking your online activity. Theoretically, that means no one should be able to identify you when you connect to a network and browse the internet, even your ISP.  In practice, though, there are plenty of gaps that hackers can exploit. A while back, Lifehacker covered browser fingerprinting , which uses hundreds of data points, like your hardware specs, operating system version, web browser, and GPU signature, to establish a shadow profile that follows you around even when your VPN is enabled. There's another way cyberattackers can intercept your data, and it involves exploiting a communication leak right inside your browser.  Major browsers like Chrome, Firefox, and Edge have a feature called WebRTC that lets them bypass the encrypted Transmission Control Protocol (TCP) tunnel created by your VPN to establish high-speed connections for de...

We may earn a commission from links on this page. Deal pricing and availability subject to change after time of publication. This 65-inch Samsung M80H TV is currently $647.99 (originally $797.99). For anyone who wants to level up from a smaller TV without having a screen take over the entire room, 65 inches is the sweet spot; it gives you that cinematic feel for movies and gaming but is still easier to place on a media console or stand than a more massive alternative (that said, the 75-inch model is also 33% off right now). Samsung 65-Inch Class M80H Series TV $647.99 at Amazon $797.99 Save $150.00 ...

We may earn a commission from links on this page. If you're like me, you are paying for a ton of subscriptions you don't even remember signing up for. Let's make this the year of only having subscriptions that add to our lives. The digital services below are the best things you can subscribe to in 2026 if you want to actually improve yourself and your world, whether it's through cutting your DoorDash bill, supporting your local bookstore, or finding obscure movies to impress your friends. Best overall digital subscription of 2026: Apple One While there's no single digital service that everyone will like, Apple One comes close. Anyone with an iPhone (i.e., most phone users in the U.S.) will appreciate a single digital bundle that covers Apple Music, Apple TV+, Arcade, and extra iCloud storage. That's streaming, gaming, and storage covered for $21.95 a month. Pro tip: The Family Plan includes six separate accounts for $27.95 a month, and your "family"...