10 Best Smart Lock Over Existing Deadbolt 2025 in the United States

The Schlage Encode Smart WiFi Deadbolt Lock offers a comprehensive solution for modern home security needs. One of its key strengths is its built-in WiFi compatibility, allowing you to control and monitor your lock from anywhere using the Schlage Home app. This makes it highly convenient for managing up to 100 access codes and viewing lock history remotely. The lock's compatibility with Alexa, Google Home, and Apple HomeKit ensures seamless integration with various smart home systems, providing hands-free control options. Additionally, it is designed to work with platforms like Airbnb, making it easier to manage guest access codes.

Security is a top priority with features like encrypted connections, a customizable alarm for door movement and forced entry attempts, and a fingerprint-resistant touchscreen. The lock has also received high ratings for security, durability, and finish from BHMA industry experts. Installation is straightforward, requiring just a screwdriver, and the Snap ‘n Stay design helps keep the lock in place during installation. The lock is battery-operated, using four AA batteries that can last up to six months and includes a low-battery indicator both on the touchscreen and in the app.

The reliance on batteries means you'll need to keep replacements on hand. The physical backup key is a helpful addition in case of electronic failure. While the Schlage Encode Smart WiFi Deadbolt excels in many areas, its primary drawback might be the ongoing need to monitor and replace batteries, which some users could find inconvenient.

The Schlage Encode Smart Wi-Fi Deadbolt with Camelot Trim in Matte Black offers a robust solution for those seeking to upgrade their existing deadbolt with a smart lock. Key strengths include built-in Wi-Fi for remote access without additional accessories and compatibility with Alexa for voice control. This makes it easy to lock, unlock, and check the status of your door from anywhere, providing added convenience and security.

The lock also supports up to 100 unique access codes via the Schlage Home or Key by Amazon apps, making it simple to manage access for family and friends. The fingerprint-resistant touchscreen and built-in alarm technology enhance security, along with alerts for potential security breaches and low battery warnings. Installation is straightforward with just a screwdriver thanks to the unique snap ‘n stay technology, making it accessible for most users. The lock's matte black finish and rectangular design offer a sleek, modern look that complements various door designs.

It is important to measure your door's dimensions to ensure compatibility. One potential drawback is the reliance on battery power, which necessitates monitoring and periodic replacement, although the lock does offer alerts and smart reordering through Amazon Dash Replenishment. Additionally, while it integrates well with Amazon Alexa, compatibility with other smart home systems like Google Assistant and Vera is available but may not be as seamless. Users who prioritize a smart lock with versatile access management, easy installation, and solid security features will find the Schlage Encode Smart Wi-Fi Deadbolt to be a reliable and user-friendly choice.

The Eufy Security Smart Lock C220 offers several appealing features for those looking to upgrade their existing deadbolt. It boasts a long battery life of about 8 months using 8 AA batteries, which is relatively convenient. The fingerprint recognition feature gets more accurate over time, making it easier to unlock your door with a single touch. Additionally, you have multiple unlocking options, including the eufy Security app, keypad, physical key, Apple Watch, and voice commands via Alexa or Google Assistant, offering great flexibility in how you access your home.

The built-in Wi-Fi allows you to control the lock remotely without requiring a separate bridge, which simplifies setup and use. Compatibility with standard US and Canadian deadbolts means installation is straightforward, generally taking around 15 minutes without the need for drilling. The lock also integrates well with other Eufy products, enhancing your smart home ecosystem if you already use Eufy devices. The lock is IP53 waterproof and can operate in extreme temperatures, adding to its durability.

It is important to note that it holds a BHMA Grade 3 rating, which is lower compared to higher security grades. While this may be sufficient for many households, those requiring higher security might need to consider other options. Additionally, the reliance on AA batteries could be seen as a drawback for some users preferring rechargeable options. Despite these points, the Eufy Security Smart Lock C220 is a robust and versatile choice for enhancing home security with smart features.