Smart Lock FAQs

Short version: smart lock batteries typically last 6-12 months with an advance low-battery warning, every lock on this hub includes a backup entry method for when batteries die or WiFi drops, and reputable brands mitigate the real but manageable security risk that comes with any connected device.

The Four Decisions That Actually Matter

Before comparing individual models, it helps to settle four questions. They determine which smart lock category you should even be shopping in, and they matter more than any single spec on a listing page.

Entry Method: Keypad, Fingerprint or App-Only

A keypad code is the most universally reliable entry method, since it doesn't depend on a phone battery, a WiFi signal or Bluetooth pairing. Fingerprint entry adds convenience for the household member unlocking the door daily, but it should always come with a keypad or key backup for a finger that won't scan in cold weather or with wet hands. App-only entry — unlocking purely through a phone, with no physical keypad at all — is the least reliable primary method and works best as a secondary option layered on top of a keypad, not a replacement for one.

Connectivity: WiFi, Bluetooth, Z-Wave and Matter

Built-in WiFi gives a lock direct internet access with no extra hardware, so you get remote lock and unlock plus activity notifications straight out of the box. Bluetooth-only locks connect to your phone at close range but generally need a separate bridge accessory for true remote access from outside the house. Z-Wave and Zigbee locks talk to a smart-home hub rather than the internet directly, which is the standard approach for integrating a lock into a broader system like SmartThings. Matter is the newer, brand-agnostic standard designed to let a lock work across Google Home, Amazon Alexa and Apple Home without three separate integrations — worth prioritizing if you want to avoid being locked into one ecosystem.

Do You Need a Hub?

A lock with built-in WiFi needs no hub at all for remote access. A Bluetooth-only or Z-Wave lock generally does, whether that's a dedicated bridge sold by the same brand or a general-purpose smart-home hub you already own. Check the specific listing for whether a hub is included, sold separately, or required at all — this is one of the most common reasons a buyer ends up needing an extra purchase they didn't budget for.

Deadbolt Compatibility and Retrofit Basics

Nearly every smart lock on the market is built to retrofit the same standard deadbolt hole already cut into a US residential door, so replacing an existing deadbolt is usually a same-afternoon DIY job with a screwdriver. Check your door's backset (commonly 2-3/8" or 2-3/4") and thickness against the specific lock's listed compatibility range before ordering — a mismatch is the single most common reason for a return in this category. See our full DIY smart lock install guide for the complete step-by-step process.

Renters and Landlords: What to Check First

If you rent, check your lease before installing anything — many leases require restoring the original hardware at move-out, which means keeping the old deadbolt in a safe place rather than discarding it. A lock that retrofits the existing hole without modifying the door or frame is the safest choice for a rental, since it can be swapped back in minutes. Landlords managing a short-term rental or Airbnb should look specifically at models built for remote guest-code management — see smart locks for Airbnb hosts ranked by owner reviews for picks suited to that use case rather than the everyday-household priorities covered here.

Weather and Outdoor Durability

The exterior half of a smart lock is exposed to genuine weather, so check the listing for a stated temperature range and any water-resistance rating before buying for an uncovered entry door in a harsh climate. Extreme cold can affect battery performance and touchscreen responsiveness on some models, and a keypad without a backlit or illuminated design can be difficult to use at night regardless of temperature. A physical key backup becomes more important, not less, in a climate where a frozen keypad or a dead battery is a realistic possibility.

Guest Codes and Scheduled Access

One of the genuine advantages a smart lock has over a traditional deadbolt is the ability to issue a separate code to someone without handing over a physical key. Most keypad and app-connected locks support several codes at once, and many let you set an expiration date or a limited time window — a code that only works Tuesday through Thursday between 9am and 5pm for a regular cleaner, for example, or one that expires automatically after a single weekend for a short-term guest. Scheduling features vary by brand and sometimes require the manufacturer's app or an active subscription, so check the specific listing rather than assuming every model handles this the same way. Deleting a code you no longer want active takes seconds in the app, which is meaningfully faster than rekeying a traditional lock after a falling-out with a contractor or a former tenant.

Security Basics Worth Understanding

A reputable smart lock from an established brand encrypts its communication and adds real protections most traditional deadbolts don't have, like a temporary lockout after several failed keypad attempts. That said, no connected device is completely immune to attack, and a lock's physical build quality still matters as much as its digital security — a smart lock with a flimsy bolt or a weak strike plate is still a weak lock, no matter how good its app is. Buying from a known brand with a track record of firmware updates, checking for ANSI Grade 1 or Grade 2 certification on the bolt itself, and keeping the lock's firmware current are the three things that do the most to keep a smart lock genuinely secure over its lifespan. None of that is unique to smart locks, either — grade certification and build quality have always been the difference between a lock that resists forced entry and one that doesn't, connected features aside.

Common Questions

For product picks, see leading smart locks, fingerprint locks compared side by side or keyless entry locks ranked by owner reviews. For installation steps, see installing a smart lock.