August Smart Lock 2nd Gen Silver
Score: 72/100
Sifely Smart Lock
Score: 75/100Rankings
The Sifely Keyless Entry Fingerprint Smart Door Lock is a budget-friendly lever-style lock with high user capacity and easy DIY installation. It lacks weather-proofing ratings and emergency power options, limiting its suitability for harsh outdoor environments. It is best suited for interior doors or sheltered entry doors in multi-user households.
The August Home Smart Lock 2nd Generation is a retrofit smart lock that fits on the interior side of most single-cylinder deadbolts, preserving the existing key while adding app-based control. It requires a separate Wi-Fi bridge for remote access, which is a notable trade-off for users wanting immediate out-of-the-box connectivity. It is best suited for Apple HomeKit users and renters who want a non-destructive smart lock upgrade.
| Attribute | | |
|---|---|---|
6 months | 12 monthsbest | |
— | 41.5 mmbest | |
— | 60 mmbest | |
| ↓ lower better | — | 0.3 secondsbest |
— | -10 °Cbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Connectivity & Smart Home(2) | ||
Smart Home Compatibility | Apple HomeKit, Alexa, Google Assistant | Alexa, Google Assistant |
Voice Assistant Support | Siri, Alexa, Google Assistant | Alexa, Google Assistant |
Access & Security(4) | ||
Encryption Standard | AES | White-box cryptography |
Unlock Methods | App, Voice, Physical Key, Bluetooth | Fingerprint, Keypad, Fob, Card, App, Mechanical Key |
Fingerprint Recognition Speed (seconds) | seconds | 0.3 seconds |
Alarms | true | false |
Durability & Environment(2) | ||
IP Rating | Not specified | |
Operating Temperature (°C) | °C | -10 to 70 °C |
Power & Battery(3) | ||
Battery Life (months) | 6 months | 12 months |
Power Source | AAA Batteries | AA Batteries |
Low Battery Indicator | true | false |
Physical & Installation(4) | ||
Door Thickness Compatibility (mm) | mm | 33-50 mm |
Backset (mm) | mm | 60, 70 mm |
Lock Type | Retrofit | Lever Handle |
Installation Type | Retrofit | DIY |
Products in the top-left offer the best value (high score, low price).
Professional reviewers stress the lock's easy, non-destructive installation, its retention of the original key, and its broad smart-home ecosystem support, especially HomeKit.
Everyday users highlight the convenience of eliminating key fumbling, the usefulness of virtual guest keys, and the peace of mind provided by activity logs.
“much better than expected for the price”
“love the fingerprint unlock indoors; it becomes a habitual, quick method”
Professional reviewers position the Sifely keyless fingerprint lock as a budget-friendly, easy-install option with strong suitability for indoor, family, and light exterior use.
Users rate this lock highly for interior use and protected entry doors, praising its ease of installation and value for money.
