August Wi-Fi Smart Lock.
Keep your keys, upgrade your door. We test the 4th generation August lock to see if the smallest retrofit smart lock is still the king of convenience in 2026.
| Specification | Detail |
|---|---|
| Lock Type | Retrofit (Attaches to existing deadbolt) |
| Connectivity | Built-in Wi-Fi (2.4GHz) | Bluetooth 4.2 |
| Voice Control | Apple HomeKit, Alexa, Google Assistant |
| Dimensions | 45% smaller than the previous Pro model |
The Good
- ✓ Retrofit design means you can keep your original exterior keys—perfect for renters or those who like their door’s aesthetic.
- ✓ The “Auto-Unlock” feature is eerily accurate; it detects your phone as you approach and opens the door hands-free.
- ✓ Integration with Apple HomeKit is seamless, making it a top pick for iPhone and Apple Watch users.
The Bad
- ✗ Uses 2x CR123 batteries which can be expensive and harder to find than standard AAs.
- ✗ Battery life is relatively short (2-3 months) if the Wi-Fi usage is heavy.
The “Keep Your Keys” Strategy
The August Wi-Fi Smart Lock is unique because it only replaces the interior thumbturn of your deadbolt. From the outside, your door looks exactly the same. This is a massive advantage if you live in a society with strict aesthetic rules or if you are renting an apartment in Gurgaon.
Installation takes less than 10 minutes. Because you don’t touch the exterior hardware, your physical keys still work as a foolproof backup, giving you total peace of mind without any “lock-out” anxiety.
Seamless Smart Home Integration
August has always been the gold standard for software. The 4th gen model has Wi-Fi built-in, so you can lock/unlock your door from the office or check if your kids reached home safely. It bridges the gap between your physical door and your digital life effortlessly.
The “DoorSense” technology is another highlight—it uses a small magnet to tell you if the door is not just locked, but actually closed. No more wondering if the wind blew your door open while you were away.
Final Verdict
The August Wi-Fi Smart Lock (4th Gen) is the best choice for anyone who wants a smart lock without changing their entire door hardware. Its software polish, auto-unlock reliability, and compact design make it a premium addition to any smart home setup. While battery life could be better, the convenience it offers is unparalleled.