Smart Locks: What to Buy, What to Avoid, and What Nobody Tells You

We get called out to smart locks that "stopped working" more than almost any other device. Nine times out of ten the lock is fine. The door is the problem. We'll get to that, because it's the part the box doesn't mention and the reviews never test.

First, the buyer's guide.

Form factor: replacement vs. retrofit

There are two ways to make a deadbolt smart.

• Full replacement deadbolt. The whole lock comes out and a new one goes in — new exterior trim, new cylinder, new keys. You get the cleanest look and usually the most features (keypads, fingerprint readers, integrated handlesets).
• Retrofit. The unit mounts on the interior side only and motorizes the existing thumbturn. Your exterior cylinder, your existing key, and your existing hardware finish all stay exactly as they are. If you've got a matched handleset in a finish you like, or a front door where the exterior hardware is part of the look, retrofit is often the smarter buy. It's also the easier install and the easier thing to undo.

Then the entry method: keypad (best for households with kids, dog walkers, cleaning crews), app-only (fine until your phone is dead and you're standing on the porch in the rain), or fingerprint (fast, and generally reliable, though wet or cold fingers are less consistent than the marketing suggests). Most good locks give you more than one.

The connectivity mess, explained simply

This is where people get confused in the store, so here it is in plain terms:

1. 1Bluetooth only. The lock talks to your phone when you're standing at the door. No remote access — you can't let the plumber in from work unless you add a bridge. Cheapest, longest battery life.
2. 2Wi-Fi. Direct remote access from anywhere, no hub required. The trade-off is real: keeping a radio talking to your router eats batteries considerably faster than the alternatives.
3. 3Z-Wave or Zigbee. Low-power mesh protocols. They need a hub, but they sip power, they're reliable, and they play well with the rest of a real smart-home setup. If you already own a hub, this is usually the best-behaved option.
4. 4Matter / Thread. The newer standard, built to let devices from different manufacturers work across Apple, Google, Amazon and SmartThings without a pile of separate bridges. It's genuinely improving cross-platform compatibility. It is not magic, support varies by device and by app, and it's worth checking that the specific lock and the specific ecosystem you use both actually support what you want to do.

The thing nobody tells you: it's the door

Here's the whole secret. Your wrist is stronger and smarter than a small battery-powered motor. If your deadbolt binds — if you have to pull the door toward you, lift it slightly, or lean a shoulder into it to get the bolt to throw — you have been compensating for a misaligned door for years without noticing. You are the reason that lock works.

Put a motor in that same lock and it will strain, drain its batteries, throw an error, and eventually jam halfway. Then you'll blame the electronics.

The pre-install door checklist

Before any smart lock goes on, this is what gets checked and fixed:

• The door doesn't sag on its hinges. Loose or worn hinge screws let the door drop, and the bolt no longer lines up with the hole. Long screws into the framing usually pull it right back.
• The deadbolt throws fully with zero resistance when the door is closed — with the door *closed*, not while you're holding it open. Test it. It should feel identical either way.
• The strike plate is aligned, the bolt hole in the jamb is deep enough and not clogged with paint, and the plate is fastened with long screws that reach the framing behind the jamb, not the little 3/4-inch screws it shipped with.
• Backset and bore hole are standard (typically a 2-1/8 inch bore with a 2-3/8 or 2-3/4 inch backset). Most locks fit both, but odd doors exist.
• Door thickness is within the lock's range, and there's clearance for the interior housing to sit flat against the door.

Security realities

A smart lock's real security value is operational, not cryptographic:

• Per-person codes. The dog walker gets a code. The cleaning crew gets a code that only works Thursday mornings. When somebody's done, you delete the code instead of rekeying the house.
• Auto-lock. The lock relocks itself after a set time. This alone probably prevents more incidents than everything else on the list, because the most common security failure in a house is a door somebody forgot to lock.
• Tamper and forced-entry alerts, and a log of who unlocked what and when.

And an honest note: intruders overwhelmingly don't defeat lock cylinders. They kick door frames and they go through windows and unlocked back doors. So the highest-value security upgrade at your front door is reinforcing the strike — a heavy-duty strike plate with three-inch screws driven into the stud behind the jamb — and it costs almost nothing. A thousand-dollar lock in a jamb held by short screws is theater.

Batteries, backups, and what to avoid

Every smart lock runs on batteries, and every smart lock will eventually run out. Know your backup before you need it: most keep a physical key cylinder, and many keypad-only models have exterior contacts where you can hold a 9V battery to give it just enough juice to open. Find out which yours has and keep a key somewhere that isn't inside the house.

What to avoid: no-name brands with no history of security or firmware updates — this is a device on your front door and on your network, and it should come from a manufacturer that's still going to exist and still going to patch it in five years. And avoid any lock that can't be operated when the internet is down. If the cloud service is having a bad day, or your provider drops out, you should still be able to punch in a code or turn a key and walk into your own house. Full stop.

We fix the door first, then install the lock

That's the difference between a smart lock that works for five years and one that annoys you for five weeks. We plane, shim, re-hang, realign strikes, and reinforce jambs — and then we install and set up the lock and get the codes and app working before we leave. Reach Wright Way Services at (770) 301-4638 to get on the schedule.