A smart lock is the entry point upgrade that replaces lost keys, rekeying expenses, and key copying with codes, fingerprints, app unlock, voice unlock, and remote access for rentals. The wrong smart lock ships with a weak motor that strains on misaligned strike plates, app that loses Bluetooth pairing weekly, batteries that die in 3 months, or smart-home integration that drops out after firmware updates. After comparing 14 current smart locks, these seven stood out for mechanism reliability, app stability, battery life, and ecosystem support across Alexa, Google, HomeKit, and Matter.
Picks were narrowed by ANSI grade certification, unlock method options, battery life, smart-home protocol, install difficulty, and warranty history.
Quick comparison
| Lock | Style | Unlock | Protocol | Battery life | Best for |
|---|---|---|---|---|---|
| Schlage Encode Plus | Deadbolt | Code/App/Apple | Wi-Fi+Matter | 6 mo | Overall |
| Yale Assure Lock 2 | Deadbolt | Code/App | Wi-Fi/Matter | 9 mo | Versatile |
| August Smart Lock 4th Gen | Retrofit | App/Auto | Wi-Fi/Matter | 6 mo | Retrofit |
| Aqara U100 | Deadbolt | Print/Code/Apple | Bluetooth+Hub | 12 mo | HomeKit |
| Eufy Security E330 | Deadbolt | Print/Code/App | Wi-Fi | 12 mo | Fingerprint |
| Level Lock Plus | Invisible | Card/App/Apple | Bluetooth/HK | 12 mo | Hidden |
| Igloohome Deadbolt 2S | Deadbolt | Code/App | Bluetooth | 12 mo | Vacation rental |
Schlage Encode Plus, Best Overall
The Encode Plus is Schlage's flagship Wi-Fi smart deadbolt with built-in Apple Home Key support (tap iPhone or Apple Watch to unlock) and Matter compatibility for cross-ecosystem control. ANSI Grade 1 mechanism, the highest security tier in the smart lock category.
Up to 100 access codes for family, cleaners, and guests. Wi-Fi connects directly to the router without a hub. Battery life around 6 months on four AA cells. The mechanism handles misaligned strike plates better than competitors thanks to a high-torque motor.
Trade-off: Wi-Fi power draw means more frequent battery swaps than Z-Wave alternatives. The Apple Home Key support is the standout feature for iPhone households.
Yale Assure Lock 2, Best Versatile
The Assure Lock 2 ships in multiple module configurations: Wi-Fi, Bluetooth-only, Matter-over-Thread, and Z-Wave. The same physical lock accepts swappable smart modules, which future-proofs the install against protocol changes. ANSI Grade 2 mechanism.
Touchscreen entry with anti-smudge backlit display. 250 user codes for property managers. Built-in alarm sounds on tamper detection.
Trade-off: touchscreen requires firm press, which annoys some users compared to button keypads. The modular protocol design is the standout for upgradability.
August Smart Lock 4th Gen, Best Retrofit
The August 4th Gen is the retrofit smart lock that mounts inside the door over your existing deadbolt thumb-turn, leaving the exterior keyway untouched. Renters and homeowners who want smart lock features without changing the exterior hardware pick the August.
DoorSense magnetic sensor confirms door closed before locking. Auto-Lock based on geofencing or timer. Wi-Fi built in (no separate Connect bridge needed). Matter support via update.
Trade-off: retrofit design preserves the existing deadbolt mechanism, so security is only as good as the underlying lock. Upgrade the deadbolt before adding the August for renters with poor stock hardware.
Aqara U100, Best For HomeKit
The Aqara U100 is purpose-built for Apple HomeKit with full Apple Home Key support, fingerprint reader, and a built-in Aqara Hub for additional smart-home integration. ANSI Grade 2 mechanism with fingerprint, code, app, and Apple Watch unlock.
Up to 50 fingerprint enrollments, 50 codes, and 100 NFC tags. Battery life around 12 months on four AA cells thanks to the efficient Bluetooth/Matter design.
Trade-off: full feature set requires Aqara hub or Apple Home Hub. Without either, lock falls back to local Bluetooth and PIN.
Eufy Security E330, Best For Fingerprint
The Eufy E330 ships with a fast-reading fingerprint sensor (0.3 second recognition) plus keypad, app, and Wi-Fi unlock. The fingerprint accuracy and speed leads the category, especially in cold or wet conditions where competitor fingerprint readers fail.
100 fingerprint enrollments. Built-in dual-camera doorbell version available for full entry surveillance. Battery life around 12 months on four AA cells.
Trade-off: Eufy Security's parent company history with cloud security issues makes some buyers hesitant. Local-only mode disables cloud features.
Level Lock Plus, Best Hidden
The Level Lock Plus hides the entire smart mechanism inside the door, leaving the exterior keyway and interior thumb-turn identical to a traditional deadbolt. Homeowners who want zero visible smart-tech and Apple Home Key tap unlock pick the Level.
Apple HomeKit and Apple Home Key support. Key card unlock via included NFC cards. Bluetooth proximity unlock. Replaceable CR2 lithium battery delivers around 12 months.
Trade-off: invisible design means no keypad. Family members without phones cannot unlock unless they carry a Level Key Card. Premium pricing.
Igloohome Deadbolt 2S, Best For Vacation Rental
The Igloohome 2S uses offline PIN generation, which means guest codes work even when Wi-Fi is down at the rental property. Algorithmic PIN sync between the host app and lock eliminates connectivity dependence for code generation. Direct Airbnb integration auto-generates codes for new bookings.
ANSI Grade 2 mechanism with battery life around 12 months on four AA cells. Bluetooth and optional Wi-Fi bridge for remote management.
Trade-off: lock works with Igloohome's app and ecosystem rather than the open Matter standard. Acceptable for dedicated rental use.
How to choose
Match the smart-home protocol
Matter-over-Thread is the future-proof choice. Wi-Fi locks need no hub but drain batteries faster. Z-Wave and Zigbee need a hub but extend battery life and mesh strength.
Decide on biometrics
Fingerprint adds convenience but adds cost and battery draw. Keypad-only locks last longer on batteries. Apple Home Key tap is the most secure quick-unlock for iPhone users.
Pick ANSI Grade 2 minimum
ANSI Grade 1 is residential-grade highest tier. ANSI Grade 2 is the standard for quality smart locks. Avoid uncertified or Grade 3 hardware.
Plan for power and network outages
Physical key backup, mechanical override, or alternative entry path matters when batteries die or Wi-Fi drops. Carry a spare AA pack and keep a physical key with a trusted neighbor.
For related reading, see our breakdowns of video doorbells compared and Matter smart home guide. For how we evaluate smart home devices, see our methodology.
The smart lock category covers everyday household entry, short-term rental operations, and retrofit installs across Wi-Fi, Matter, and Bluetooth designs. Match protocol and biometrics to your ecosystem, plan for battery and network failure scenarios, and the lock pays back through eliminated key copying and faster guest access.
Frequently asked questions
Are smart locks as secure as traditional deadbolts?+
The lock mechanism on quality smart locks meets or exceeds ANSI Grade 2 standards, equal to mid-tier traditional deadbolts. Security weakness shifts from physical lock-picking to digital attack surface: weak codes, Bluetooth pairing flaws, or compromised cloud accounts. Use 6 to 8 digit codes, enable two-factor auth on the app, and pick brands with quick security update history. Physical key backup is still recommended for power or network failure scenarios.
How long do smart lock batteries last?+
6 to 12 months on AA batteries for Z-Wave and Zigbee locks. 3 to 6 months on Wi-Fi locks because the radio draws more power. Bluetooth-only locks reach 12 to 18 months. Battery life depends on daily lock cycles, climate temperature (cold weather drains batteries faster), and notification frequency. Most locks deliver low-battery warnings 2 to 4 weeks before failure. Keep spare AA batteries near the door for quick swaps.
Wi-Fi, Z-Wave, Zigbee, or Matter?+
Matter is the new universal smart-home standard supported by Apple, Google, and Amazon, and the safest long-term choice. Wi-Fi works without a hub but drains batteries faster. Z-Wave and Zigbee need a hub but deliver longer battery life and stronger mesh networking. For new buyers, pick Matter-over-Thread locks. For existing SmartThings, Hubitat, or Home Assistant users, Z-Wave matches the existing mesh.
Can I use a smart lock on a rental property?+
Yes, smart locks are the standard tool for short-term rental hosts because each guest can receive a unique code that auto-expires at checkout. Schlage, Yale, and Igloohome integrate directly with Airbnb and Vrbo for automatic code generation. For long-term rentals, check local landlord-tenant law before installing; some jurisdictions require landlord access through a physical key path.
Do smart locks require a smart-home hub?+
Wi-Fi smart locks connect directly to your router and need no hub. Z-Wave, Zigbee, and Thread locks need a compatible hub (Echo, Apple Home Hub, SmartThings, Aqara, or similar). Matter-over-Thread requires a Thread Border Router, which most current Echo and Apple HomePod devices include. Bluetooth-only locks work without any hub but lose remote unlock capability when you're away from home.
