eufy Security Smart Lock FamiLock S3 Max with Palm Vein Recognition, Keyless Entry Front Door Lock, Wi-Fi Keypad Deadbolt+ 2K HDR…
Best for
Best with video doorbell
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$279.98
Updated Jun 27, 2026 · 1 min read
Sources behind this verdict
11 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the eufy FamiLock S3 Max is the all-in-one play: a Matter-enabled deadbolt that also packs a 2K HDR video doorbell, palm-vein recognition, 16GB local storage, and an interior screen for viewing the camera feed. pcmag, a medium-trust source with disclosed testing, reports palm recognition was 'speedy and worked without issue' and the touchscreen keypad was responsive. High-trust Best Buy verified-purchase reviewers like that it reads their palm reliably and removes the need to carry keys.
What reviewers liked
- Combines a deadbolt, 2K HDR video doorbell, palm-vein biometrics, and interior screen in one unit
- pcmag found palm recognition fast and the keypad responsive; Best Buy verified buyers praise palm unlock
- Door-sensor auto-lock and ANSI/BHMA Grade 1 certification cited by community reviewers
Where it falls short
- r/EufyCam owners report the lock occasionally bogs down and biometrics go unresponsive
- Broader eufy doorbell threads complain of slow app feed loading
- pcmag notes a subscription model and limited smart-home compatibility
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Across the reviewers we read, the eufy FamiLock S3 Max is the all-in-one play: a Matter-enabled deadbolt that also packs a 2K HDR video doorbell, palm-vein recognition, 16GB local storage, and an interior screen for viewing the camera feed. pcmag, a medium-trust source with disclosed testing, reports palm recognition was 'speedy and worked without issue' and the touchscreen keypad was responsive. High-trust Best Buy verified-purchase reviewers like that it reads their palm reliably and removes the need to carry keys.
The disagreement shows up in community signals. r/EufyCam owners report the lock occasionally 'feels bogged down,' with the keypad or palm reader temporarily unresponsive, and broader eufy doorbell threads complain about slow app feed loading (one cites 22 seconds). Counterbalancing that, r/eufy_security and r/MacSources posts praise the door-sensor-based auto-lock and call palm-vein recognition more consistent than other biometrics, citing its ANSI/BHMA Grade 1 certification.
The consensus: if you want a lock and video doorbell combined with novel palm biometrics, it's the most complete device here, but it carries the app-lag and occasional sluggishness that follow eufy's camera ecosystem. A subscription and limited smart-home compatibility, per pcmag, are additional considerations.
- Palm Vein Unlocking
- Advanced Security with 99.9% Accuracy. Achieve recognition in just 0.6 seconds with cutting-edge, forgery-proof palm vein recognition. This next-gen security feature relies on the unique vein patterns in your palm, ensuring top-tier protection. Plus, your palm vein data is stored securely on the device, keeping your privacy intact.
- This all-in-one device
- A 2K HD camera with an f/1.6 lens for sharp, clear visibility—even at night. A video doorbell with a 150° Head-to-Toe wide-angle view that eliminates blind spots, perfect for monitoring packages or checking on visitors. A smart lock with real-time visitor alerts. Whether it's ensuring your family's safety or giving peace of mind when older people or children are home alone, the FamiLock S3 Max keeps you connected and reassured.
- The Rear Lock Video Screen
- The Rear Lock Video Screen allows you to effortlessly check the front door status anytime, without needing a smartphone app. Its simple, intuitive design makes it ideal for the elderly and children, offering a quick and hassle-free way to see who’s at the door. Perfect for households seeking an easy-to-use, app-free solution for monitoring the front entrance.
- Dual Power Supply System
- Stay powered with a rechargeable battery offering up to 4 months of full functionality, plus an emergency set of 4 AAA batteries for an extra month of essential functionality in case of power outages.
- Seamless Home Automation with Matter & Apple Home
- Easily integrate with the eufy Ecosystem & HomeBase 3 for advanced AI security features. Supports Matter for smooth, secure connections with Apple Home, Google Home, Alexa, and SmartThings—giving you a privacy-first, future-ready smart home experience. [Note: Camera streams are not supported via Matter due to current limitations. For full features and the best experience, please use the eufy App.] Matter is now compatible with HomeBase 3 for simultaneous use. This video lock is not compatible with HomeBase 2.
The Eufy FamiLock S3 Max is a Matter-enabled smart lock that doubles as a 2K video doorbell and includes palm scanning, voice control support, and an innovative interior screen that lets you view the camera feed from inside your home.
I've recently experienced some weirdness with mine. It feels like it's bogged down sometimes, and then any number input or the palm reader wont ...
The built-in smart door sensor ensures the lock engages only when the door is fully closed, preventing accidental locking.
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“Is This the Ultimate Smart Lock?” · eufy FamiLock S3 Max Review
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