August
August Wi-Fi Smart Lock (4th Gen)
$149 – $179
Check Current Price →SafeAtHome Guide's Take
Retrofit smart lock that attaches to your existing deadbolt — no re-keying needed. Works with Alexa, Google, and Apple HomeKit. Auto-lock, door sense, and activity log make it ideal for aging-in-place safety.
The August Wi-Fi Smart Lock (4th Gen) is the best retrofit smart lock for aging-in-place use precisely because it doesn't require replacing the existing hardware. The August attaches to the inside of your existing deadbolt — your current keys still work, locksmith isn't needed, and the exterior of your door looks unchanged.
For seniors and their caregivers, the real value is in the access management features. You can grant and revoke digital keys remotely, which means a home health aide can have a code that works only on weekday mornings, a neighbor can have emergency access, and you'll get an alert every time the door is unlocked. The Auto-Lock feature can automatically lock the door after a set interval — important for anyone who might forget.
Door Sense technology tells you whether the door is truly closed and locked, not just whether the lock was triggered. That distinction — which standard smart locks miss — prevents scenarios where the door bounced open after locking.
Pros
- Installs over existing deadbolt in minutes
- No new keys or rekeying
- Auto-lock and door sense included
- Works with all major smart home platforms
Cons
- Requires existing single-cylinder deadbolt
- Wi-Fi can drain battery faster
- No exterior keypad included (sold separately)
Specifications
| battery | 4x AA |
| battery life | 3-6 months |
| connectivity | Wi-Fi + Bluetooth |
| compatibility | Alexa, Google, HomeKit, SmartThings |
Frequently Asked Questions
Does a smart lock work without internet?
Most smart locks work offline for basic keypad entry even without internet. The smartphone app features (remote access, activity log, digital keys) require internet connectivity. Physical keypads always work independently of Wi-Fi or Bluetooth.
How secure are keypad locks?
ANSI Grade 1 keypad deadbolts (like the Kwikset 991) provide the highest residential security rating. Keypad entry with a numeric PIN is generally as secure as a physical key for everyday use.