The Nest Protect won the best overall category in our 2019 roundup of the best smart smoke and carbon monoxide detectors. If there is enough smoke to trigger the emergency alarm, you can quickly silence it from your smartphone via the Nest app—no chair climbing or towel waving required. Instead of a single alarm tone, the Nest Protect speaks in a clear voice to alert you about smoke, fire, or an abundance of carbon monoxide in an area of your home. Keep in mind that the National Fire Protection Association recommends placing your smoke alarm at least 10 feet from your oven, stove, or other cooking appliance to avoid any false alarms. I've got more keys than I'd like on my keychain and that takes up quite a bit of valuable space in my tote bag. Investing in a good smart lock can not only reduce the size of your growing keychain but it also offers an unmatched level of modern convenience. Lock your keys in the house?No problem. Forget your house keys at the office?No biggie. You can unlock your door with a digital keypad or by using apps like Schlage Home or Key by Amazon. After testing a number of smart locks, our smart home team found the Schlage Encode to be the best WiFi deadbolt. If you have a babysitter or dog walker that comes by with any regularity, you’ll appreciate that the lock can remember up to 100 permanent, temporary, or recurring passcodes.