What Is A Smart Lock And How Does It Work?

22 minutes read

A smart lock is an electronic and mechanical locking device that enhances the traditional concept of door locks by incorporating digital technology for security and convenience. Unlike conventional locks that require a physical key, smart locks can be operated remotely using smartphones, tablets, or computers via a Bluetooth or Wi-Fi connection. They often feature keypads for PIN entry or support biometric verification like fingerprint scans. Smart locks work by communicating with a smartphone app or a smart home system, allowing users to lock or unlock doors remotely, monitor access logs, and receive notifications about entry or exit events. Some smart locks are integrated with virtual assistants, enabling voice control. They may also support temporary digital keys so users can grant time-limited access to guests or service providers. Enhanced security features, such as auto-lock or unlock when the user's phone is nearby, add an extra layer of convenience and protection. Overall, smart locks offer flexible and user-friendly access control, aligning with smart home automation ecosystems.

Best Smart Locks of February 2025

1
Schlage BE499WB CAM 619 Encode Plus WiFi Deadbolt Smart Lock, Keyless Entry Touchscreen Door Lock with Camelot Trim, Satin Nickel

Rating is 5 out of 5

Schlage BE499WB CAM 619 Encode Plus WiFi Deadbolt Smart Lock, Keyless Entry Touchscreen Door Lock with Camelot Trim, Satin Nickel

  • ANYWHERE ACCESS: With built-in WiFi compatibility, you can easily and securely connect your Schlage Encode Plus lock to your home WiFi network to control and monitor your home from anywhere with the Schlage Home app
  • PEACE OF MIND: Lock and unlock from anywhere, manage up to 100 access codes, view lock history, receive customizable notifications and easily manage multiple locks at once - all when paired to the Schlage Home app and connected to a secure WiFi network
  • TAP TO UNLOCK: Works with Apple HomeKit and Apple home keys; with home keys you can simply tap to lock or unlock using your iPhone or Apple Watch for easy and secure access to your home
  • VOICE CONTROL: Works with Amazon Alexa and Google Assistant for optional, hands-free convenience when paired with the Schlage Home app and a voice enabled device
  • ADVANCED SECURITY: Secure, encrypted connection; built-in, customizable alarm for door movement and forced entry attempts; fingerprint-resistant touchscreen; certified highest residential Security, Durability and Finish rating by BHMA industry experts
2
eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3

Rating is 4.9 out of 5

eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3

  • 8 Months Battery Life: With 8 AA batteries, Smart Lock C220 runs around 8 months. Experience ultimate convenience and peace of mind with our long-lasting power solution. *May vary depending on the frequency of the lock being used.
  • Self-learning AI: Fingerprint door lock recognition gets more precise with every touch, so you don't have to try agian and again to get in. Never be awkward or upset at unlocking the door. [6 Ways to Unlock] Unlock with a touch for less than 1.5s with fingerprint lock. You can also open your front door lock via the eufy Security app, using the keypad or physical key, from Apple Watch, or use your voice with Alexa/Google Voice Assistant.
  • Control from Anywhere with Built-in Wi-Fi: No bridge required, you can control your wifi smart lock from anywhere via the eufy Security app. Easy setup. (Access management, Real-time notification, Event History)[Integrated eufy ecosystem] If you have a eufy doorbell, you can add your wifi door lock to your routines and control devices together for keyless entry within the eufy Security app.
3
eufy Security Smart Lock C210, Keyless Entry Door Lock, Built-in WiFi Deadbolt, Smart Door Lock, No Bridge Required, Easy Installation, Touchscreen Keypad, App Remote Control, 4 AA Batteries Included

Rating is 4.8 out of 5

eufy Security Smart Lock C210, Keyless Entry Door Lock, Built-in WiFi Deadbolt, Smart Door Lock, No Bridge Required, Easy Installation, Touchscreen Keypad, App Remote Control, 4 AA Batteries Included

  • Easy Installation and Excellent Customer Service: Compatible with most standard US deadbolts. 15-minute easy install without drilling. 18-month aftersales service with 24/7 customer support.
  • Control from Anywhere with Built-in Wi-Fi: No bridge required, you can control your smart lock from anywhere via the eufy Security app. Easy setup. (Access management, Real-time notification, Event History) *Latest model number: C210 (Previously E110). No difference between C210 and E110.
  • Integrated Smart Home: If you have a eufy doorbell, you can add your smart lock to your routines and control devices together within the eufy Security app.
4
Schlage Encode Smart Wi-Fi Deadbolt with Century Trim in Satin Nickel

Rating is 4.7 out of 5

Schlage Encode Smart Wi-Fi Deadbolt with Century Trim in Satin Nickel

  • Smart Lock with Built-in Wi-Fi allows you to lock/unlock from anywhere - no additional accessories required. Pair with the Schlage home app or Key by Amazon app to create and manage up to 100 access codes for trusted friends and family for recurring, temporary or permanent access.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit..Operating Temperatures: Outside escutcheon: -35C to 66C,Inside escutcheon: -10C to 49C.
  • WORKS WITH ALEXA: Check the status of your lock and lock/unlock your door. In addition, Alexa will let you know when your battery is running low or set-up smart reorders through Amazon dash replenishment so you always have replacement batteries when needed.
  • Fingerprint-resistant, capacitive touchscreen with easy one-touch locking. Optional voice control offers hands-free convenience when using voice-enabled products
5
Yale Security Assure Lock 2 Deadbolt, Black Suede Smart Entry Door Lock with Wi-Fi Connected Keypad for Code Entry Door Lock and Remote Access with Back-Up Key, YRD410-WF1-BSP

Rating is 4.6 out of 5

Yale Security Assure Lock 2 Deadbolt, Black Suede Smart Entry Door Lock with Wi-Fi Connected Keypad for Code Entry Door Lock and Remote Access with Back-Up Key, YRD410-WF1-BSP

  • KEY-FREE ACCESS, YOUR WAY: Everyone that needs access can choose their own way to unlock, whether it's the keypad, voice assistant, Auto-Unlock or the Yale Access App on your smartphone or Apple Watch. This product will not work outside of the U.S. or Canada.
  • DON’T WORRY, IT'S LOCKED: Never worry again about remembering to lock the door. Yale can be set to Auto-Lock once DoorSense detects that the door is closed.
  • NOT HOME? USE THE APP: We know that even when you’re not home, it’s still on your mind, and your to-do list. Lock-up, let someone in, receive notifications and share access from anywhere using the Yale Access App.
6
Keyless-Entry Fingerprint Smart Door Lock: Sifely Digital Electronic Lock with Code Passcode, Electric Door Knob, Biometric Door Handle Lock, Perfect for Exterior/Interior/Entry/Bedroom Doors (Silver)

Rating is 4.5 out of 5

Keyless-Entry Fingerprint Smart Door Lock: Sifely Digital Electronic Lock with Code Passcode, Electric Door Knob, Biometric Door Handle Lock, Perfect for Exterior/Interior/Entry/Bedroom Doors (Silver)

  • [Homeowners & Rental Hosts] A Great solution for short-term rental hosts, self-housing residents and property managers. Generate a passcode remotely w/o internet and share it to your visitors.
  • [Advanced 3D Fingerprint] Unlock the door in less than 0.3 seconds with our 3rd generation fingerprint access technology. The most secured 6-in-1 Keyless Entry Smart Door Lock: Fingerprint + Passcode + Wireless Key Fob + Card + Smartphone + Key.
  • [Easy Installation] Easy to install in minutes with just a Phillips screwdriver. No extra drilling needed. No locksmith needed. Door handle is reversible for both left- and right- handed doors. Up to 1-year of battery life with 4 AA batteries.
7
eufy Smart Lock C30, Keyless Entry Door Lock, Built-in WiFi Deadbolt, Smart Lock for Front Door, No Bridge Required, Easy Installation, App Remote Control, Auto Lock

Rating is 4.4 out of 5

eufy Smart Lock C30, Keyless Entry Door Lock, Built-in WiFi Deadbolt, Smart Lock for Front Door, No Bridge Required, Easy Installation, App Remote Control, Auto Lock

  • Remote Control from Anywhere: With built-in Wi-Fi and no bridge required, you can effortlessly control your smart lock from anywhere using the eufy Security app. Enjoy easy setup, access management, real-time notifications, and event history.
  • Smart Lock: Easily open your door using a physical key, voice commands with Alexa/Google Assistant or a physical button. eufy smart lock's physical buttons offer enhanced durability and error resistance, providing greater reliability and usability than touchscreens. Auto-lock secures your door if you forget, locking automatically based on your time setting, whether the door is open or closed.
  • Easy Installation and Excellent Customer Service: Compatible with most standard Deadbolts. The 15-minute DIY installation requires no drilling. eufy is on standby for you 24/7. Enjoy a worry-free 18-month protection backed by professional customer service, available by telephone, email, and LiveChat.
8
TMEZON Smart Door Lock Fingerprint, Keyless Entry Door Lock with Handle, APP/IC Cards/Codes/Keys/Fingerprints Biometric Electronic Keyless Entry Lock for Bedroom Home Hotel Office

Rating is 4.3 out of 5

TMEZON Smart Door Lock Fingerprint, Keyless Entry Door Lock with Handle, APP/IC Cards/Codes/Keys/Fingerprints Biometric Electronic Keyless Entry Lock for Bedroom Home Hotel Office

  • [5 Multiple Ways To Unlock]: Fingerprint + Passcode + APP Control+ IC Cards (4 PCS for 12-15 MHZ) + Physical Keys (2 PCS). The door lock supports to add 50+ fingerprints, 100 pcs IC cards. TMEZON smart door knob will provide more options for you to unlock & lock your door easier and safer. Let’s make your life more convenient and secure without keys.
  • [TUYA APP Smart Control]: You can lock/unlock door, share E-codes, check Log records, alert prompt, manage users via TUYA Bluetooth App to unlock and manage your smart door lock more convenient anywhere anytime. (Not WIFI, No any fees charged for the APP)
  • [Fingerprint Quick Unlock]: One touch unlock your door much more faster within 0.2 seconds with new upgraded 99% recognition rate fingerprint access technology. You don't have to worry about forgetting the key when you go out, you can use your fingerprint to unlock at any time. Note: Please wake up the lock first before unlock by fingerprinter or passcode.


What is the difference between smart locks and traditional locks?

Smart locks and traditional locks differ in several key ways, primarily in their mechanism of operation, features, and how they integrate with modern technology.

  1. Mechanism of Operation: Traditional Locks: These typically operate using a mechanical key that physically moves the internal mechanism to lock or unlock a door. Common types include deadbolts and pin tumbler locks. Smart Locks: These use electronic mechanisms that can be operated via a smartphone app, keypad, biometrics, or other wireless protocols like Bluetooth, Wi-Fi, or Z-Wave.
  2. Features: Traditional Locks: Usually limited to basic locking and unlocking functions. They may come in different styles and security grades, but all require a physical key. Smart Locks: Offer additional features such as remote access, temporary virtual keys for guests, activity logs, integration with smart home systems, voice control, and automated locking/unlocking based on proximity.
  3. Security: Traditional Locks: Depend heavily on the physical integrity of the lock and the security level of the keyway. They are vulnerable to picking, bumping, and physical force. Smart Locks: Provide convenience but can present digital vulnerabilities such as hacking if not properly secured. However, some offer encryption and multi-factor authentication to enhance security.
  4. Convenience: Traditional Locks: Require the possession of a physical key, which can be inconvenient if keys are lost or forgotten. Smart Locks: Allow for keyless entry and can be managed remotely, making it easier to give access to multiple users or temporary guests without needing physical keys.
  5. Integration: Traditional Locks: Standalone devices with no connectivity to other devices or systems. Smart Locks: Often integrate with smart home ecosystems, working in harmony with other smart devices such as lights, cameras, and thermostats.
  6. Installation and Maintenance: Traditional Locks: Generally simpler to install and maintain, with a long history of designs and standards. Smart Locks: May require a more complex installation due to electronic components and need regular software updates and battery changes.


Both types have their pros and cons, and the choice between them often depends on personal preference, the level of security desired, and the need for technological integration.


How do you upgrade a smart lock firmware?

Upgrading the firmware of a smart lock usually involves using a mobile app provided by the lock’s manufacturer. Here’s a general guide, but it's essential to refer to the specific instructions for your particular lock model:

  1. Check Requirements: Ensure your smartphone is compatible with the lock’s app. Make sure your phone has a stable internet connection. Keep the lock within Bluetooth range if required.
  2. Download the App: Install the official app for your smart lock from your device’s app store (Apple App Store or Google Play Store).
  3. Create/Log into an Account: If this is your first time using the app, you'll likely need to create an account. If you already have an account, just log in.
  4. Pair/connect Your Lock: Follow the in-app instructions to pair your smart lock with your phone. This usually involves turning on Bluetooth, entering setup mode on the lock, and following prompts.
  5. Check for Firmware Updates: Within the app, navigate to the section for device settings or lock settings. Look for a firmware update option.
  6. Download and Install Updates: If a firmware update is available, you’ll usually see a notification or a prompt. Begin the update process by following on-screen instructions. This may involve downloading the firmware to your phone first, then transferring it to the lock via Bluetooth.
  7. Maintain Connection: Keep your phone close to the lock and make sure the battery levels are sufficient on both devices. Do not disrupt the connection or try to use the lock until the update is confirmed complete.
  8. Finish the Update: Once the update is complete, the app should confirm that your lock’s firmware has been successfully upgraded. Test your lock to ensure it's working correctly.
  9. Troubleshoot if Needed: If the update fails, consult the troubleshooting section in the app or visit the manufacturer’s website for assistance. General steps include restarting your phone, ensuring the lock has sufficient battery, and trying the update again.


Again, for specific instructions, consult the user manual or the manufacturer’s support resources for your smart lock model.


What is remote access in smart locks?

Remote access in smart locks refers to the ability to control and manage a lock from a distance using a smartphone, tablet, or computer. This is typically accomplished through a wireless connection, such as Wi-Fi or Bluetooth, which allows users to:

  1. Lock and Unlock: Operate the lock without being physically present at the door, providing convenience for situations like letting in a guest or family member when you’re not home.
  2. Monitor Status: Check whether the door is locked or unlocked in real-time.
  3. Receive Notifications: Get alerts for various activities, such as when someone enters or exits.
  4. Access Logs: View a history of who accessed the door and at what time, which can be useful for security and monitoring.
  5. Grant Permissions: Provide temporary or permanent access to other users by sending digital keys or access codes, which can be set to expire after a certain period.
  6. Integration with Smart Home Systems: Connect with other smart devices or home automation systems, allowing for actions such as locking the door automatically when a security system is armed.
  7. Voice Control: Utilize voice commands through virtual assistants like Amazon Alexa, Google Assistant, or Apple Siri, if integrated.


Smart locks with remote access enhance security and convenience, making them a popular choice for homeowners looking to modernize their home security system.


What is a proximity sensor in smart locks?

A proximity sensor in smart locks is a technology used to detect the presence of an authorized user or device near the lock. When the sensor detects that an authorized entity, such as a smartphone or key fob, is within a certain range, it can trigger the lock to automatically unlock or perform other actions, such as sending a notification to the user's mobile device. This adds convenience and enhances security by allowing keyless entry and often reducing the need for manual input.


Proximity sensors in smart locks typically use technologies like Bluetooth, RFID, or NFC. Bluetooth proximity sensors, for instance, can pair with a phone app and sense when the phone is within range. RFID and NFC sensors, on the other hand, often require the user to hold a compatible card or tag close to the lock to gain entry. By using these technologies, proximity sensors provide an intuitive and seamless way to interact with smart locks, enhancing user experience while maintaining security protocols.


How do smart locks work with smart doorbells?

Smart locks and smart doorbells can work together to enhance the security and convenience of a home. Here's how they typically function and integrate:

  1. Communication Protocol: Both smart locks and smart doorbells often use Wi-Fi, Bluetooth, or other communication protocols like Zigbee or Z-Wave to connect to a home network and communicate with each other or with a smartphone or hub.
  2. Integration Platforms: Integration between these devices is often facilitated through a smart home platform or app, such as Apple HomeKit, Google Home, Amazon Alexa, or proprietary apps provided by the device manufacturers. These platforms allow for seamless interaction between different smart devices, enabling coordinated actions.
  3. Shared Features: Remote Monitoring and Control: With both devices connected to the internet, homeowners can monitor and control them remotely using a smartphone app. For instance, when a visitor presses the smart doorbell, the user receives a notification and can see and speak to the visitor in real-time. Automated Actions: Some systems allow for automated actions. For example, a user could set up a routine where the door unlocks when a specific face is recognized by the doorbell's camera, or it allows the homeowner to unlock the door remotely during a video call with a visitor. Security Enhancement: A smart doorbell with a camera can provide a live video feed when someone approaches, and this can be combined with a smart lock to verify the visitor before granting access.
  4. Scenes and Routines: Many smart home ecosystems allow users to create scenes or routines where multiple devices work in tandem. For example, a routine could be set up to automatically lock the door when the doorbell detects motion and there is no response within a set time frame.
  5. Voice Commands: With integration into a voice assistant, users can lock or unlock the door using voice commands after being notified of someone at the door, adding another layer of convenience.
  6. Third-Party Services: Some devices support integration with third-party services like IFTTT (If This Then That), allowing for custom triggers and actions between devices, even if they aren’t natively integrated.


Overall, the combination of smart locks and smart doorbells can significantly enhance the security and functionality of home entry systems, providing greater control and intelligence to homeowners.


What is a smart home ecosystem?

A smart home ecosystem refers to a network of interconnected devices and systems within a home that communicate with each other and can be controlled remotely or through automation. This ecosystem is often centered around a smart home platform, which acts as a hub to manage and integrate different devices and services. Here are some key components of a smart home ecosystem:

  1. Smart Devices: These are internet-connected appliances and systems, such as smart lights, thermostats, cameras, locks, and appliances, that can be controlled remotely via a smartphone app or voice assistant.
  2. Home Automation Systems: These systems allow for the automation of routine tasks. For example, lights can turn on or off based on the time of day or motion detection, or the thermostat can adjust based on occupancy or weather changes.
  3. Smart Hubs and Platforms: These serve as central points for communication between all smart devices. Popular platforms include Apple HomeKit, Amazon Alexa, Google Assistant, and Samsung SmartThings.
  4. Voice Assistants: Devices like Amazon Echo, Google Nest, or Apple HomePod that allow users to control smart home devices using voice commands.
  5. Connectivity: Most smart home devices rely on Wi-Fi, Bluetooth, Zigbee, or Z-Wave to connect and communicate. A robust home network is crucial for the seamless operation of the ecosystem.
  6. Security and Privacy: Security cameras, smart locks, and alarm systems can be integrated for home security. It’s also vital to ensure data privacy and secure connections to protect the home network.
  7. User Interfaces: Apps and dashboards that allow homeowners to monitor and control their devices, set preferences, create schedules, and receive alerts or notifications.
  8. Integration with Cloud Services: Many systems sync with cloud services for updates, remote access, and backup, making sure users can control and monitor their home from anywhere with internet access.


The goal of a smart home ecosystem is to enhance convenience, security, energy efficiency, and overall quality of life by allowing homeowners to seamlessly manage and control their home environment.

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