Smart Lock Buyer's Guide: What Actually Matters in 2024

I get asked about smart locks more than almost any other smart home category. It makes sense — your front door is the single most important entry point in your house, and the idea of never fumbling for keys again is universally appealing. But the smart lock market in 2024 is crowded and confusing, with options ranging from $50 to $400 and feature lists that read like alphabet soup. After living with multiple smart locks across two homes over the past couple years, I want to cut through the noise and focus on what actually matters when you are choosing one.

The Only Three Things That Matter

Before we talk about specific models, let me boil this down to the three things you should care about most, in order of priority.

First: reliability. A smart lock that fails to unlock when you are standing in the rain with groceries is worse than a dumb deadbolt. I do not care how many features a lock has if it works 95% of the time. I need 99.9%. This means looking at how the lock connects (local vs cloud), what happens during internet outages, and how responsive the mechanism is.

Second: battery life. Every smart lock runs on batteries, and most of them burn through batteries faster than the manufacturers claim. The CR123A lithium batteries that some locks use are expensive to replace. AA and AAA batteries are cheap and available everywhere. Some newer models are rechargeable via USB-C. Consider the ongoing cost and hassle of battery replacement when choosing.

Third: compatibility with your existing deadbolt. Some smart locks replace your entire deadbolt mechanism. Others are retrofit kits that attach to your existing deadbolt from the inside. The retrofit approach is easier to install, keeps your existing keys as backup, and is renter-friendly. Full replacements give you more form-factor options and often look sleaner from the outside.

My Top Picks by Category

For most people, the August Wi-Fi Smart Lock (4th generation) remains my default recommendation. It is a retrofit design, meaning you keep your existing deadbolt and keys. Installation takes about 10 minutes with a screwdriver. It works with Apple HomeKit, Google Home, and Amazon Alexa. The auto-unlock feature based on phone proximity is the best I have tested — it reliably unlocks within about 5 feet of the door, which means you can walk up to your front door with full hands and it just opens. Battery life is solid at around 3-4 months on two CR123A batteries, which is on the shorter side but acceptable given the always-on Wi-Fi connection.

If you want a keypad for sharing codes with guests or housecleaners, the Yale Assure Lock 2 is excellent. The touchscreen keypad is responsive and visible in direct sunlight (a problem with some competitors). It supports Matter over Thread, which future-proofs it nicely, and you can create temporary codes that expire after a set number of uses or at a specific time. I used one at my previous house and gave the dog walker a recurring code that only worked between 11 AM and 1 PM on weekdays. Worked flawlessly for over a year.

For the budget-conscious, the Wyze Lock Bolt deserves a mention. At around $60, it has a fingerprint reader that works surprisingly well and supports up to 50 different fingerprints. The trade-off is that it is Bluetooth only — no Wi-Fi, no remote access unless you add a Wyze gateway. For a simple "unlock my door with my finger" solution without the smart home integration, it is hard to beat the value. But the lack of remote access and smart home connectivity means I would only recommend it as a secondary lock or for someone who does not need automation features.

What About Apple Home Key and Google Wallet

Apple Home Key lets you unlock supported locks by tapping your iPhone or Apple Watch against the lock, like using Apple Pay at a store. It is fast — genuinely faster than pulling out a phone and using an app. The Schlage Encode Plus and Yale Assure Lock 2 both support it. If you are in the Apple ecosystem, it is a compelling feature that I use daily. Even when my phone is dead, my Apple Watch can unlock the door.

Google announced Wallet-based lock support at I/O 2023, but in practice it has been slow to roll out. A few locks support it, but the experience is not as seamless as Apple Home Key yet. If you are an Android user, I would not make Google Wallet support a deciding factor right now. Use a keypad code or fingerprint as your primary unlock method and treat app-based unlocking as a bonus.

Protocols: Wi-Fi vs Bluetooth vs Thread vs Z-Wave

This is where people get lost. Here is the short version. Wi-Fi locks can be controlled remotely without a hub but use more battery. Bluetooth locks are local-only unless you add a bridge/gateway. Z-Wave locks need a Z-Wave hub (like SmartThings or a Z-Wave USB stick) but are extremely reliable and battery-efficient. Thread locks are the newest option — low power, mesh networking, and Matter compatible, but the selection is still limited.

My recommendation is Thread/Matter if you are buying new in 2024, with Z-Wave as a close second for reliability. Avoid pure Bluetooth locks unless you truly do not care about remote access. Wi-Fi is fine if you do not mind replacing batteries more often — the convenience of no hub required is real.

Things I Wish Someone Had Told Me

Check your door alignment before buying. Smart locks have less tolerance for misaligned doors and sticky deadbolts than your hand does. If you have to jiggle your key or lift the door slightly to turn the deadbolt, fix that first. A misaligned strike plate is the number one cause of smart lock failures and jams, and it is a $5 fix with a file and a new strike plate from the hardware store.

Also, test the auto-lock feature carefully. Most smart locks can be set to automatically re-lock after a set time (30 seconds, 1 minute, etc.). This is great for security but terrible if you step outside to grab the mail and the door locks behind you with your phone inside. I keep auto-lock on but set it to 5 minutes, which gives me enough time to grab a package off the porch without getting locked out. Several of my neighbors have learned this lesson the hard way.

Finally, always keep a physical key backup method. Whether that is keeping your existing keys with a retrofit lock, having a keypad code memorized, or stashing a spare key with a neighbor, do not rely solely on your phone or fingerprint. Batteries die, firmware updates fail, and Bluetooth has bad days. A physical backup turns a minor inconvenience into exactly that instead of a locksmith call at 11 PM.