Some smart home gadgets seem like solutions in search of a problem, shoehorning IoT connectivity into something that was working just fine without it — unless you're that one guy who really needs to talk to Alexa while playing the keyboard. But on the opposite end of the spectrum, you've got the smart lock, an early leader into the world of the connected home that managed to reinvent a "dumb" product with some genuinely useful new functionality.

There's no shortage of smart lock options out there, running the gamut from fully integrated replacements to add-ons that quickly attach to existing locks.

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