When it comes to kitchen appliances, immersion circulators are still the new kid on the butcher block. You use these devices to sous vide, a relatively recent method of cooking that still invokes some head tilts when I try to explain it to friends. (In short, you put food in a plastic bag and cook it in a temperature-controlled water bath -- read more about the technique here.)
Though this niche cooking gadget still has some ground to gain before it becomes as common as the hand mixer, manufacturers of immersion circulators are beefing up their products' connectivity to attract tech-savvy foodies and stand out from one another. These aggressive tech additions have turned these gadgets, which often go for around $200, into one of the easiest ways to make your cooking smarter.
The Wi-Fi-enabled $200 Joule immersion circulator has just one-upped competitors like the Wifi Nomiku and the Anova Precision Cooker Bluetooth + Wi-Fi with its integration with Alexa, Amazon's voice-controlled digital assistant. That integration, along with an educational app and good cooking performance, makes the Joule ($159 at Amazon) one of the best immersion circulators available, especially if you're interested in smart home technology.