Best Retrofit
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Rankings use category fit, feature coverage, pricing signals, public reception, and recency. Affiliate relationships do not affect scores.
The August Wi-Fi Smart Lock is a premier choice for users seeking a seamless retrofit experience. It fits over your existing deadbolt, meaning you don't have to replace the exterior hardware. It offers robust remote access via Wi-Fi, allowing you to lock or unlock your door from anywhere in the worl...
The August Smart Lock (Gen 4) is the gold standard for retrofit smart locks. It installs on the interior side of your door, meaning you can keep your existing exterior hardware and keys. This makes it ideal for renters who cannot change their front door. It features Wi-Fi connectivity, allowing for...
The John Crane Aura 120NS is a mechanical seal designed for retrofit installations within centrifugal compressors. Its narrow design and dry-gas lubrication system minimize gas leakage while maintaining effective sealing performance. This seal is particularly suitable for applications requiring redu...
The Rain Bird LNK WiFi Module is a highly regarded expansion unit that integrates advanced smart capabilities into existing, reliable Rain Bird irrigation systems. It excels in maintaining professional-grade performance while adding modern connectivity. It is ideal for established properties that re...
The Lutron Caseta Smart Dimmer Switch is designed for relatively easy installation, especially for those with some DIY experience. It replaces existing switches and connects wirelessly to the Lutron bridge. While it's not a completely tool-free installation, the included instructions and videos make...
The Level Bolt Smart Lock offers a secure and modern approach to home security. It’s a discreet retrofit device designed to replace your existing deadbolt, providing keyless entry through Bluetooth connectivity and integration with Apple HomeKit. This mechanical smart lock is suitable for homeowners...
This entry-level version provides the core Wi-Fi connectivity and keypad access of the August line without the premium features or higher cost of the Pro model. It serves as a reliable stepping stone for users new to smart locks, offering remote access and code management in a familiar, retrofit for...
The August Smart Lock (3rd Gen) is a classic retrofit smart lock that is perfect for renters and those who want a simple, affordable way to add smart features to their existing deadbolt. It replaces only the interior thumb-turn, allowing you to keep your original key. While it lacks the built-in Wi-...
The Igloohome Smart Lock is a versatile retrofit solution that fits over your existing deadbolt. It is ideal for users who want to add smart features without replacing their entire hardware setup. Using Bluetooth technology, it allows for remote management via the app and provides secure access for...
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