The Best Smart Lock For Existing Deadbolt: Buyer's Guide in 2025

Our pick: Kwikset Halo Wi-Fi Smart Lock

After testing the Kwikset Halo Wi-Fi Smart Lock for several weeks, I found it to be a dependable and user-friendly smart home upgrade. The setup process was quick, and its integration with Wi-Fi eliminates the need for additional hubs or accessories, making it an excellent choice for users looking for straightforward functionality.

Functionality is where the Halo lock truly shines. The geofencing feature consistently unlocked the door as I approached, and the Kwikset app provides robust remote access and monitoring options. While it isn't without a few minor limitations, it performs well overall and adds both security and convenience to daily life.

Pros:

• Seamless Wi-Fi connectivity with no hub required

• Reliable geofence auto-unlock and scheduling features

• Intuitive app interface with activity logs and access sharing

• Easy DIY installation with clear instructions

Cons:

• Slight delay in remote command execution

• Touchscreen responsiveness could be improved in cold weather

The Kwikset Halo offers a solid balance of security, convenience, and smart functionality. While not perfect, it meets the needs of most users looking for a modern keyless entry solution. Overall, it's a smart investment for homeowners wanting both control and peace of mind.

Also great: Lockly Access Touch, 3D Biometric

The Lockly Access Touch smart lock delivers an efficient and practical solution for upgrading your existing deadbolt without full replacement. Over the course of daily use, its standout fingerprint recognition and straightforward setup proved especially convenient. With minimal effort, it transforms a standard lock into a high-tech access point.

Despite requiring a separate Wi-Fi hub for full remote functionality, the core features—especially fingerprint unlocking—perform exceptionally well. This is an ideal option for those prioritizing speed, biometric security, and easy installation without complex rewiring or door modification.

Pros:

• Lightning-fast fingerprint recognition

• Compatible with existing deadbolts

• Simple DIY installation

• Stores up to 99 fingerprints

Cons:

• Remote access requires optional Wi-Fi hub

• Limited access options without app integration

Lockly Access Touch is an impressive retrofit smart lock with a strong focus on biometric security. It’s fast, reliable, and easy to install, making it well-suited for users who want smart access without overhauling their door hardware. A strong performer in its category with a few limitations around connectivity.

Also great: Kwikset Halo Wi-Fi Smart Lock

The Kwikset Halo Wi-Fi Smart Lock in Matte Black delivers solid smart home functionality with a sleek, modern finish. I tested this model for several weeks and found it consistent, intuitive, and well-integrated with both mobile app features and voice assistants. It brings convenience and security in one simple package.

The backlit keypad and Wi-Fi connectivity make remote access and code management effortless. While its geofencing isn’t always flawless, the overall experience is smooth and effective, especially for users looking to eliminate keys without compromising on safety or style.

Pros:

• No hub required for Wi-Fi connectivity

• Easy keypad and app-based access sharing

• Smart home integration with Alexa and Google Home

• Fast DIY installation with clear guidance

Cons:

• Geofencing can be inconsistent at times

• App interface occasionally lags on slower networks

The Kwikset Halo in Matte Black offers dependable keyless entry and smart features in a premium-looking design. It's a strong contender for homeowners seeking a connected deadbolt with broad functionality and minimal installation effort. A practical and polished addition to any modern home.

Source: Amazon

What smart locks go over existing deadbolts?

There are retrofit smart locks available that are designed to go over existing deadbolts without requiring extensive modifications to the door. These retrofit smart locks are installed on the interior side of the door and typically have a mechanism that interacts with the existing deadbolt, allowing keyless entry and smart functionalities. Some examples of retrofit smart locks include the August Smart Lock, the Danalock V3, and the Yale Assure Lock SL with Connected by August.

Are smart locks compatible with all doors?

Smart lock compatibility can vary depending on the specific lock and door configuration. Most smart locks are designed to be compatible with standard door types, such as single-cylinder deadbolts or latch-style locks. However, it's important to check the compatibility requirements and specifications provided by the smart lock manufacturer to ensure that the lock can be properly installed and used with your specific door. Some smart locks may require additional hardware or modifications to ensure compatibility with certain door types.

Which smart locks can be rekeyed?

Not all smart locks have the ability to be rekeyed. Rekeying refers to the process of changing the lock's internal pins or tumblers to match a new set of keys, thereby invalidating the old keys. Some smart locks, such as those offered by Schlage, have options that allow for rekeying. For example, Schlage Connect and Schlage Encode smart locks are compatible with the Schlage rekeying kit, which enables homeowners to rekey the lock themselves without the need to hire a locksmith. It's important to check the specifications or consult with the smart lock manufacturer to determine if a particular model supports rekeying.

Is a smart lock safer than a deadbolt?

Smart locks, when properly installed, used, and maintained, can provide a high level of security similar to traditional deadbolts. Smart locks often offer additional security features such as activity monitoring, access logs, temporary access codes, and remote control capabilities. However, the security of a smart lock relies on factors such as the manufacturer's security measures, user implementation of best practices, and the quality of the lock itself. Traditional deadbolts are mechanical and not vulnerable to cyberattacks or connectivity issues. Some people prefer the simplicity and proven reliability of traditional deadbolts. Ultimately, the choice between a smart lock and a deadbolt depends on individual preferences, security needs, and comfort level with technology.

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