eufy Security Smart Lock FamiLock S3 with Palm Vein Recognition, Keyless Entry Door Lock for Front Door, Wi-Fi Keypad Deadbolt+ 2K HDR Doorbell Camera, 16 GB Built‑in Storage, BHMA 1, No Monthly Fee

Love this lock. It’s so convenient! We’ve been using it for almost a year. Works great. The camera is nice and crisp. The field of view is great. Battery charge holds up good. Easy to install and operate. Autolock - great feature! We have a cheaper model on our interior garage door. Love this brand.

Impressed with all the options and features. UI Is a bit confusing tho and I do agree that the hands/vein technology is difficult to get to work. I’m gonna try creating multiple versions of my hands to see if that’ll improve things like I’ve done with the thumbprint one. Actually wishing I had the fingerprint one still. The video mechanism works great and you can choose different lengths to film, which I really like. I did feel that the battery could’ve lasted a bit longer. It lasted about a month before it needed recharging them but the four AA batteries held fine while it was being charged. This was with a lot of people coming in and out though. Np installing to door (although had my handyman do it). NOTE: after putting it together it will have u press a button in the back wheee the battery is and if u already put the cover on np bc it’s super easy to take off. I did have to try connecting a couple of times. If you have issues with this part and it talks about router settings go to your Internet provider settings online or app and change signal to 2.4 only from dual band (2.4 and 5.0) temporarily and then u won’t have a problem.

Love this lock and camera! it was easy to install, and the set up was fast. great quality! i will say i wish there was a way to have 24/7 recording on these, but i understand that they dont because it would just drain the battery fast. aside from that, the battery life one this has been great. it's been about 3 months since i had it on and the battery is only at about 80% still. it has auto locking to it, but i wish there was a quick way to turn that off instead of having to go into the settings to turn that off.

The lock is a great lock with advanced biometric technology. The battery life is great. Video quality is good but can sometimes take a little bit to decode. However, it doesn’t recognize my 5-year-old kid’s palm well. For adults, it unlocks pretty fast with palms.

Will randomly unlock throughout the day. Unacceptable. The camera feature and everything else is fine but totally unacceptable for it to randomly unlock. Return window is closed and i cant do anything about it. Tried to recalibrate but issue persists.

I bought this to replace a separate doorbell and lock, and it definitely cleans up the front porch. The 2K video is sharp, and I love that there’s no monthly subscription fee to see my clips. Installation was straightforward and took about 30 minutes with a standard screwdriver. Pros: • No Subscriptions Huge win. Local storage is the main reason I went with Eufy. • Camera View. The 180-degree lens actually lets me see packages sitting on the ground. • Build: The lock feels heavy and secure—doesn't feel like cheap plastic. Cons: • The Palm Reader: This is the headline feature, but it’s not perfect. It works about 85% of the time on the first try. If your hand is at a slight angle or if you’re standing too close, it usually fails and you have to reset and try again. It’s still faster than keys, but not as "instant" as I hoped. • Bulk: It’s a very large unit. If you have a screen door, double-check your clearances because this sticks out quite a bit. It’s a solid upgrade if you want to ditch your keys and your doorbell subscription in one go. Just be prepared to have a little patience with the palm sensor until you learn exactly where it likes your hand to be. Battery life is long

Replaced our fingerprint-reducing Eufy smart lock. I LOVE the palm reading feature (so much easier, and more reliable than the fingerprint reader, which was causing me grief after 2 years, as it kept failing to recognize my fingerprints). But this new smart lock is amazing, and the palm reading feature seems to work without any problems (knock on wood). Things that I especially like about this: 1. No need to touch the lock (like with the fingerprint reader) 2. The Black color looks much sleeker than the old silver-toned lock we had…PLUS, the black color makes reading the back-lit number pad SO much easier to read (our old lock was silver, with white numbers, and even being back-lit, it was next to impossible to see the numbers, especially in bright sunlight). 3. Love the locks integrated camera & doorbell (allowing us to remove our separate Eufy doorbell camera, which was starting to get annoying in terms of needing to charge it every 6 weeks or so). 4. The doorbell button is easy to recognize - it lights up and has a small bell icon on it (believe it or not, with the basic Eufy doorbell camera, the design is such that the camera lens and the doorbell button are both about the same size and shape, and the button wasn’t marked or labeled — and I can’t tell you how MANY times people came to our door, thought they were ringing the doorbell, but were really smashing their thumb onto the round camera lens! — mademfor funny videos, but not a very effective doorbell if people don’t know where to press) 5. A HUGE added benefit of this model is the long battery life, PLUS the back-up AA batteries that function if the main battery dies (unlikely if you’re paying the slightest attention to your Eufy app)…but more importantly, the AA batteries work while the main battery is being re-charged (so you don’t have to leave your door unlocked all day, like we had to do with the old Eufy lock, because we needed to be able to have people come and go). Overall, I truly LOVE this smart lock, and I expect to get many years of enjoyable use out of it (again, knock on wood!)

Installed it in January 2026. Took 2 months' vacation, came back in April and the palm reader didn't work. Tried the PIN and not working neither. Got in the house using backdoor. The app indicated "backup battery power in use". Here are 2 false advertising: 1) "battery last 5 months". Not even 3 months. 2) "Only palm reader not working with backup battery". Pin didn't work neither. Recharged battery and still not recognized. The attached pic is AFTER recharging. Contacted Eufy and they'll send battery replacement. Will update again. Love it when it's working and planned on updating all my locks. Phew!

The eufy FamiLock S3 has been a huge upgrade for me, especially after returning the Lockin Veno. Assembly was surprisingly simple and frustration-free. Everything fit together intuitively, and the instructions were clear enough that I had the lock fully installed and running in far less time than I expected. What really sets the FamiLock S3 apart from the Veno is the feature set. The responsiveness of the fingerprint reader, the smoothness of the touchscreen, and the overall build quality all feel a step above. The app integration is cleaner too, with faster updates and more reliable notifications. After dealing with connection hiccups and slower response times on the Veno, this lock feels like a breath of fresh air. Another big draw for me was eufy’s strong security reputation. Their focus on privacy and local data processing gave me a lot more confidence in choosing a smart lock that would actually protect my home without sending data who-knows-where. It’s reassuring to know the company behind the product takes security seriously. Overall, the FamiLock S3 has been easy to set up, easy to use, and packed with thoughtful improvements over the lock it replaced. I’m genuinely glad I made the switch.

Update: I want to share my experience with the product. Their customer service is excellent and resolves my issues quickly. The product itself is good, although the out-of-the-box experience could be improved. However, they are committed to addressing any problems. They mentioned they are working on the issues I raised to prevent other consumers from having the same experience. I like the brand, and currently, I own an indoor camera, a doorbell, and this smart door lock. --- I purchased the FamiLock S3 because I already own a Eufy doorbell and have been happy with that product. Unfortunately, this smart lock has been a frustrating experience from the start, and I feel compelled to warn other buyers. Installation issues right out of the box: If your door uses a rounded bolt plate (which is extremely common), the included hardware won’t work, you’ll need to contact their customer support to have the correct plate shipped to you. Be prepared to wait up to 15 business days for it to arrive, meaning your installation is stuck on hold for three weeks through no fault of your own. You can try to hack with blue tape while you wait. Missing tool not included: The lock requires a long, thin Torx (star-head) screwdriver to install, the kind shown in the attached photos. Yet it is not included in the box. Without this specific tool, installation is simply not possible. Buyers shouldn’t have to discover this the hard way after unboxing. Misleading product images: The most frustrating part is the interior screen shown prominently in the product listing. It gives the clear impression that a peephole-style interior display is included with your purchase. It is not. That screen is a separate $140 upgrade, a fact buried in the fine print. Featuring a paid add-on as a core visual in the listing is, in my opinion, straightforwardly misleading to consumers. I had high hopes for this product given my positive experience with the brand’s doorbell, but between the compatibility issues, missing tools, and deceptive product imagery, I cannot recommend the Eufy FamiLock S3 in its current form. Eufy needs to be more transparent about what’s actually in the box.

Works well. Integration was easy with the S3 base and Alexa

I really wanted to love the Eufy Lock S3 — palm vein recognition, multiple unlock methods, and a sleek design all sounded great. Unfortunately, real-world use has been disappointing. The connectivity is unreliable. The lock frequently shows offline in the app, notifications are delayed or sometimes never arrive, and remote access can be hit or miss. For a smart lock, that’s a major downside. The palm vein recognition, which is supposed to be the standout feature, is inconsistent. Sometimes it works instantly, other times it fails multiple times depending on lighting or hand position. That’s frustrating when you’re standing at your door trying to get in. Another big issue is that this lock is not well-suited for single doors. The design and alignment of camera especially at night times video/image quality is so poor. The price fluctuates very often, which is also annoying. One day it’s listed at a premium price, then it drops significantly, then goes back up again. That makes it hard to justify buying something that already feels inconsistent.

This is a great lock. Easy to install and set up. It seems to work very well. Recognizes our family palms and not others that I've tested with. I like the auto lock after a certain amount of time and you can define a time frame to do this so throughout the day you are not constantly unlocking the door. It only uses the key it came with. Would be nice if it can be rekeyed to match the other house doors. I have not tried to get spare keys made yet so not sure that is an option. The button that covers the key hole and emergency power plug keeps falling open. This is also the doorbell button so it tends to be used regularly and just does not fit tight after you open it. DON'T OPEN IT IF YOU DONT HAVE TO! LOL