Renters face unique challenges when upgrading to smart locks: most leases prohibit replacing hardware, and apartment deadbolts vary widely in quality and configuration. We tested seven retrofit smart locks designed to work with existing deadbolts without permanent modification, evaluating each on installation time, battery life under realistic usage patterns, guest access management, and compatibility with common apartment door configurations. The August Wi-Fi Smart Lock 4th Gen remained our top pick for renters, installing over the existing thumb turn in under 10 minutes with no tools beyond a screwdriver. Its DoorSense magnet confirmed lock status, and the auto-unlock feature worked reliably with both iOS and Android. The Schlage Encode Plus impressed with its HomeKey support, letting you unlock with an iPhone tap. The Yale Assure Lock 2 offered the most flexible access options with keypad, Bluetooth, and optional Wi-Fi module.
Best Smart Locks for Apartments in 2026: 7 Retrofit Locks That Work With Rental Deadbolts
