Yale August Smart Lock
Highest scored product for this feature based on supporting review evidence.
Highest scored product for this feature based on supporting review evidence.
Balances feature score, supporting reviews, and overall product strength.
Has the broadest review evidence for this feature.
Strongest overall product among items with scored evidence for this feature.
Physical key override remains an important safety net: reviews repeatedly note you can still unlock with a normal key if batteries die or smart features misbehave.
Pros: Existing hardware reuse, Hub requirement
Cons: Battery, Voice control
Backup entry is a recurring highlight: a concealed keyway behind the doorbell button plus an external USB-C emergency power option reduces lockout risk if the battery is depleted.
Pros: Value and Price, Lock/unlock speed
Cons: Geofencing
The hidden physical key is broadly viewed as a reliable backup, and emergency external power via a USB port adds another recovery option when batteries die. This layered fallback approach...
Pros: Door compatibility (deadbolt fit), Weather resistance
Cons: Two-factor authentication availability, Jam detection
A physical key is included and used as a backup method; no review reported key override failures, and several call out the presence of emergency power as an additional fallback.
Pros: Door-sense, Key override reliability
Cons: Geofencing
Key override is consistently presented as a usable backup method, and reviewers treat it as a standard fail-safe alongside digital access. Detailed long-term reliability testing is not common in the...
Pros: Backset compatibility, Guest Codes and Access
Cons: Keyway quality, Pick/drill resistance (if rated)
A hidden physical keyway plus included keys provide a dependable backup, and multiple reviewers recommend carrying a key in case of connectivity or power issues. Manual operation from inside remains...
Pros: Locking motor, Backset compatibility
Cons: Wi-Fi, Keyway quality
A traditional key backup is consistently included and generally works as expected, providing a dependable fallback alongside electronic methods. Emergency power via USB-C is also commonly mentioned for worst-case scenarios.
Pros: Hub requirement, Door compatibility (deadbolt fit)
Cons: Door-sense, Geofencing
Most reviews praise the physical key backup as a dependable fail-safe for dead batteries or edge cases, and note that key operation is smooth.
Pros: Hub requirement, Locking motor
Cons: Auto-unlock, Door-sense
Physical key override is valued as a reliable fallback for dead batteries or connectivity issues; some reviewers note only one key is included, but the cylinder is easy to rekey...
Pros: Hub requirement, Physical attack resistance
Cons: Auto-unlock, Door-sense
A physical key is available (often hidden under a cover), and multiple videos highlight an emergency 9V contact method to power the lock long enough to get inside if the...
Pros: Backset compatibility, Lock/unlock speed
Cons: Voice control, Smart-home integration (Alexa
Backup entry options are well covered, with a traditional key cylinder and an exterior 9V jump-power method noted for dead batteries.
Pros: Fingerprint, Finish durability
Cons: Notifications, Smart-home integration (Alexa
Mechanical key backup is consistently included and the hidden keyhole cover is appreciated for aesthetics and casual security, with reviewers generally treating it as a dependable fallback.
Pros: Guest Codes and Access, User access management
Cons: Fingerprint, Warranty and support
Physical keys remain a dependable fallback and are appreciated because the lock lacks external emergency power terminals. Reviewers report rarely needing the key, but value having it when batteries or...
Pros: Smart-home integration (Alexa, Google
Cons: Fingerprint, Door-sense
Physical key backup was consistently confirmed as a reliable fallback alongside UWB, NFC, fingerprint, keypad, and app access.
Pros: Lock/unlock speed, Smart-home integration (Alexa
Cons: Physical attack resistance, Hub requirement
Physical key access is consistently positioned as the dependable backup, especially because emergency external power is not emphasized across reviews. A few reviewers note only one key is included.
Pros: Build quality and durability, Finish durability
Cons: Geofencing, Door-sense
The hidden physical key and external USB-C emergency power option give the E330 credible backup access if the battery runs down.
Pros: Locking reliability, Notifications
Cons: Door-sense, Geofencing
Backup entry options include a physical key and a USB-C emergency power port, which reviewers view as important failsafes.
Pros: Auto-unlock, Lock/unlock speed
Cons: None
Backup entry is well covered via a traditional keyway, and several reviews also liked the USB-C emergency power option as an extra failsafe when batteries die.
Pros: Hub requirement, Backset compatibility
Cons: Door-sense, Smart-home integration (Alexa
The hidden keyway under the doorbell button and the availability of an emergency USB-C power option are valued for backup entry. One reviewer noted the doorbell-button cover can be fiddly...
Pros: Physical attack resistance, Weather resistance
Cons: Value and Price
Keyed versions provide a dependable physical fallback, while key-free versions lean on 9V emergency power terminals; both approaches work, but key-free owners need to be mindful of battery state to...
Pros: Security features (encryption), Two-factor authentication availability
Cons: Warranty and support, Battery
The addition of a mechanical key is repeatedly framed as an important reliability upgrade for emergencies and battery-related scenarios.
Pros: Hub requirement, Value and Price
Cons: Door-sense
Key override is a reliable fallback because the exterior hardware stays unchanged, and several reviewers like that a locksmith can still service the cylinder without destroying the smart module. However,...
Pros: Existing hardware reuse, Battery
Cons: Finish durability, Auto-unlock
Keeping the original key is repeatedly framed as an important safety net. Given reports of occasional unresponsiveness or motor limitations, multiple reviews imply you should keep a backup key accessible...
Pros: Existing hardware reuse, Access logs
Cons: Build quality and durability, Fingerprint
Because there is no physical key cylinder, reviewers are split: some like the security simplicity, while others dislike having no traditional fallback. Emergency 9V power is available, but several describe...
Pros: Weather resistance, Warranty and support
Cons: Auto-unlock, Door-sense
Obsidian is keywayless, so there is no physical key override if electronics fail; the emergency fallback is the external 9V jump terminals plus your PIN.
Pros: Existing hardware reuse, Locking reliability
Cons: Key override reliability, Bluetooth