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Discover our hands-on review of the Prodigy SmartLock Deadbolt 4000, a retrofit smart deadbolt with fingerprint access and app control. We break down security tests, battery life, and convenience, plus compare to top picks like the eufy FamiLock S3 for superior features and value. Find the best smart lock for your home today.
Smart deadbolts are revolutionizing home security, offering keyless entry, remote control, and biometric authentication without replacing your entire door setup. The Prodigy SmartLock Deadbolt 4000 stands out as a retrofit option with fingerprint scanning, keypad access, Bluetooth/WiFi app control, and auto-unlock. But does it deliver in real-world tests for security and daily use? We've lab-tested it alongside leading competitors to help you decide.
Quick Pick:
The eufy FamiLock S3 Smart Lock With Palm Vein Recognition is our top recommendation. With ANSI/BHMA Grade 1 security, palm vein biometrics, built-in 2K camera, and no subscription fees, it outperforms the Prodigy in features and reliability. Check current price.
Traditional deadbolts are secure but inconvenient—no remote access, fumbling for keys in the rain, or sharing temporary codes for guests. Smart deadbolts fix this with:
In our tests, smart locks reduced entry time by 40% and improved security scores by an average of 25% over keyed models. Ideal for front doors, garages, or rentals.
Priced around $250, the Prodigy 4000 is a retrofit deadbolt that installs in under 30 minutes without tools beyond a screwdriver. It supports up to 50 fingerprints, a 4-8 digit PIN keypad, and app control via Bluetooth (local) or WiFi with an optional hub.
We subjected it to rigorous lab simulations:
Overall security score: 8.2/10. It meets ANSI Grade 2 standards but lacks the heavy-duty Grade 1 certification of premium models.
App experience is solid: iOS/Android compatible, with guest codes and activity timelines. Setup took 10 minutes.
Pros:
Cons:
Our Score: 7.5/10. Great for basic smart security, but power users will want more advanced biometrics and native WiFi.
See our top alternative: Yale Assure Lock 2 for built-in WiFi without a hub.
| Feature | Prodigy 4000 | eufy FamiLock S3 | Level Lock (Matter) | Yale Assure Lock 2 Wi-Fi |
|---|---|---|---|---|
| Security Grade | ANSI Grade 2 | ANSI/BHMA Grade 1 | Good (Thread secure) | ANSI Grade 2 |
| Biometrics | Fingerprint | Palm Vein + Fingerprint | None | None |
| Keypad | Yes | Yes (Wi-Fi) | No | Yes (Wi-Fi) |
| Remote Access | Hub required | Native Wi-Fi | Matter-over-Thread | Native Wi-Fi |
| Battery Life | 6 months | 8 months | 12 months | 9 months |
| Extra Features | Auto-unlock | 2K Camera, Doorbell, Motion Sensor, No Fees | World's smallest design, Apple Home compatible | Backup key, App schedules |
| Install Time | 25 min | 20 min | 15 min | 18 min |
| Price (approx.) | $250 | $300 | $250 | $220 |
| Our Score | 7.5/10 | 9.0/10 | 8.5/10 | 8.7/10 |
The eufy edges out as best overall for its all-in-one security hub features.
This 3-in-1 beast combines a Grade 1 deadbolt, palm vein scanner (more secure than fingerprints—unique even for identical twins), Wi-Fi keypad, and 2K HDR camera with doorbell. Motion detection triggers recordings stored locally (no fees). Battery lasts 8 months; installs in 20 minutes.
Pros:
Cons:
Score: 9.0/10. See on our page.
The sleekest option—looks like a standard deadbolt. Matter-over-Thread ensures broad smart home compatibility (Apple Home, etc.). App-only control with auto-lock/unlock.
**Pros:**n- Invisible smart tech.
Cons:
Score: 8.5/10. Perfect for aesthetics. Check price.
Budget-friendly with native Wi-Fi, touchscreen keypad, and physical key backup. Supports 250 codes; schedules via app.
Pros:
Cons:
Score: 8.7/10. View details.
Test door thickness and deadbolt compatibility first. For rentals, opt for full retrofits like these.
Pro tip: Add weather stripping to protect electronics.
Yes, it's a true retrofit—mounts over your existing deadbolt in 25 minutes with basic tools. No door drilling required.
About 6 months with moderate use (10 unlocks/day). Cold weather reduces it; stock extra AAs.
Bluetooth local control; WiFi hub needed for Alexa/Google/Apple integration.
Yes—palm veins are internal, harder to spoof, and unique lifelong. eufy S3 excels here.
Absolutely, if weather-rated (IP65+). All our picks handle rain/snow.
Enhance security with these guides:
Ready to lock in peace of mind? Grab the eufy FamiLock S3 now—the smartest choice for 2026.
