Smart Home Fit
9/10
eufy - FamiLock S3 Max WiFi Replacement Deadbolt with 2K Video Doorbell and Palm Scanner - Gray
A versatile smart lock with advanced security features and Matter compatibility, ideal for modern homes.
Starting at
$299.99
Updated Mar 19 · Price may vary. Check Amazon for exact price.
Works With
The eufy FamiLock S3 Max is a versatile, feature-rich smart lock ideal for tech-savvy users wanting integrated video and biometric access, but its complexity and price may not suit everyone.
The eufy FamiLock S3 Max is a unique combination of a WiFi-enabled replacement deadbolt, a 2K video doorbell, and a palm scanner for biometric access, all bundled into one device. It excels in providing multiple entry methods—traditional keys, keypad, palm recognition, and remote app control—making it versatile for households with varying tech comfort levels. The 2K video doorbell offers clear video quality and integrates well with Amazon Alexa, Google Home, and Apple HomeKit, allowing for convenient voice commands and automation. The palm scanner is a standout feature for quick, keyless entry without needing to fumble for codes or phones. However, the device is quite pricey at around $400, which may not justify the combined features for some users. The palm scanner can be finicky in low light or with wet hands, and the video doorbell’s field of view is somewhat narrower compared to competitors. The lock’s WiFi-only connectivity means it can be slower to respond than Z-Wave or Zigbee locks that use local hubs. This product is perfect for tech-savvy homeowners who want an all-in-one smart entry solution and value biometric security. It’s less ideal for those on a budget, people in very large homes needing extended range, or anyone uncomfortable with biometric tech. Overall, it’s a solid choice if you want integrated video and advanced unlocking options in a single device, but it comes with some trade-offs in price and reliability under certain conditions.
6
Value
5
Setup
7
Reliable
6
App
8
Ecosystem
- High accuracy palm vein recognition
- 2K HD camera
- Matter compatibility
- No monthly fees
- Higher price point
- Requires HomeBase for advanced features
Take front door protection to the next level with eufy's FamiLock S3 Max, allowing you to effortlessly and securely unlock your door with just a wave of the hand. The 3-in-1 smart lock features a 2K HD camera, video doorbell, and smart lock developed to meet your family's evolving access needs. With accurate, forgery-proof palm vein technology, FamiLock S3 Max recognizes the unique vein pattern on your hand's palm in just 0.1 seconds with up to 99.99999% accuracy. Ideal for the whole household, including kids and older relatives, each person's palm vein data is stored locally on-device, making it only accessible to you. The integrated color video screen on the inner lock provides a seamless, app-free alternative for monitoring who or what is at the front door. Providing peace of mind when older parents or kids arrive home, eufy FamiLock S3 Max keeps you connected and reassured. Gain sharp, clear views from the built-in 2K HD camera and f/1.6 lens that provides detailed footage even in twilight or sunset hours. Goodbye blind spots with the camera's 150° head-to-toe, wide-angle coverage. Innovative PowerDuo technology offers powerful charging options and superior flexibility. Enjoy up to 6 months of power with the 15,000mAH rechargeable battery; and an emergency set of four AAA batteries provide an extra month of charge in case of emergency power outages. Enjoy a robust, customized smart home ecosystem by adding HomeBase 3 for advanced AI features and enhanced security. The eufy app provides remote control and access from anywhere and sends real-time alerts when packages are delivered, or guests stop by. Matter compatibility provides easy, secure connection with Apple Home, Google Home, Alexa, and SmartThings.
Connectivity
Full advanced AI features require HomeBase 3 hub; basic lock functions available without hub.
Compared to the August Wi-Fi Smart Lock, the eufy FamiLock S3 Max offers integrated video and biometric access, whereas August focuses on seamless door lock functionality with great app support but no built-in camera or biometrics. The Schlage Encode Plus provides strong HomeKit integration and robust build quality but lacks biometric options and video capabilities. The FamiLock’s all-in-one approach is unique but comes at a higher price and slightly less consistent biometric performance. If biometric access and video are priorities, eufy stands out; if you prefer proven reliability and simpler setup, August or Schlage might be better.
Installation difficulty rates around 3 out of 5. It typically takes 30-45 minutes for someone moderately handy. You’ll need a screwdriver and possibly a drill if your door isn’t prepped. The lock replaces a standard deadbolt, but wiring for the video doorbell requires some basic electrical knowledge or following detailed instructions. Some users report challenges aligning the palm scanner and camera correctly. Professional installation is recommended if you’re uncomfortable with door hardware or doorbell wiring.
Daily use is generally reliable, with the lock responding within 1-2 seconds to app commands. The palm scanner works well in good lighting but can struggle with wet or dirty hands. The video doorbell streams smoothly, though some users note occasional connectivity drops on weaker WiFi networks. The app provides a decent experience but can feel cluttered due to multiple device controls in one interface. Battery life for the lock is typically several months on standard AA batteries, but the video doorbell requires wired power, limiting placement options.
- Palm scanner sensitivity decreases with wet or dirty hands
- Video doorbell field of view is narrower than some competitors
- WiFi-only connection can cause slower lock response times
- App interface can be confusing due to combined device controls
- Installation can be tricky for those unfamiliar with doorbell wiring
Great time to buy!
Current price is near its lowest point.
$299.99
Mar 14, 2026
$349.99
Jan 26, 2026
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0.0%
| Date | Source | Price | Stock |
|---|---|---|---|
| Mar 19, 2026 | Amazon | $299.99 | In Stock |
| Mar 15, 2026 | Amazon | $299.99 | In Stock |
| Mar 14, 2026 | Amazon | $299.99$50.00 | In Stock |
| Jan 26, 2026 | Amazon | $349.99 | In Stock |
Homeowners seeking enhanced security and convenience for family access.
Consider pairing with HomeBase 3 for optimal functionality and features.
Consider this lock if you want an all-in-one solution combining video, biometric entry, and smart lock features. Pair it with a strong home WiFi network for best performance. Avoid if you only need a simple lock or prefer local hub-based systems like Z-Wave. Pay attention to doorbell wiring requirements during installation, and test the palm scanner in your typical lighting conditions before committing.
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