Smart Lock Review: Yale Assure Lock SL

I've tried several smart door locks over the years and, while such devices can be quite convenient, there are often compromises. Not so with the Assure Lock SL ($169) from Yale. I really liked how heavy duty and well made the equipment is. The Assure Lock SL is sold in assorted finishes (satin nickel, polished brass, or oil rubbed bronze) so it should fit in with most homes. It also sports a compact, elegant touchscreen that makes it easy to lock the door on your way out; just tap the keypad as opposed to hunting for a lock button.

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The lock itself is powered by AA batteries that are inside the house. If you're worried about getting locked out, they have a batteyr backup mechanism using a 9V battery port on the outside so you can provide enough juice to enter. To enter, you can assign up to 25 pin codes, with 4–8 keys per code.

Compared to several other such locks, the Yale Lock is easy to install and you probably don't have to use anything other than a screwdriver. Other locks have required me to drill special holes, aside from the doorknob hole, and that's frustrating. However, you may need to choose a network module that works with your smart home. Yale offers Z-wave and HomeKit versions, each sold for $50, or you may be able to order a kit with both items.


  • Heavy duty and well made
  • Assorted finishes with elegant touchscreen
  • AA batteries and quick charge with 9V battery
  • Up to 25 pin codes, 4–8 keys per code
  • Easy to install


  • May need to choose a network module

Final Verdict

If you are looking for a smart security accessory, look no further. The Assure Lock SL from Yale  should meet your needs. 

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Todd Bernhard's picture

Todd Bernhard is a bestselling (6+ million downloads) award-winning (AARP,,, Digital Hollywood, and Verizon) developer and founder of NoTie.NET, an app developer specializing in Talking Ringtone apps including AutoRingtone. And his profile photo is of the last known sighting of Mr. Bernhard wearing a tie, circa 2007!

An iPhone is almost always attached to his hip or in his pocket, but over the years, Mr. Bernhard has owned an Apple Newton, a Motorola Marco, an HP 95LX, a Compaq iPaq, a Palm Treo, and a Nokia e62. In addition to writing for iPhone Life, Mr. Bernhard has written for its sister publications, PocketPC Magazine and The HP Palmtop Paper.