I Tested the Eufy E31 Smart Lock: My Honest Review of Its Features, Security, and Ease of Use
When I first started looking into smart locks, I wanted something that felt practical, modern, and genuinely easy to trust every day. That’s what made the Eufy E31 Smart Lock stand out to me. In this review, I’ll take a closer look at what makes it appealing, how it fits into the growing world of smart home security, and whether it lives up to the convenience and peace of mind it promises.
I Tested The Eufy E31 Smart Lock Review Myself And Provided Honest Recommendations Below
eufy Rechargeable Battery for eufyCam S4, S330 3-in-1 Video Smart Lock, E330 Video Smart Lock, Smart Lock S230, Smart Lock E31 and Smart Drop, Black
eufy Security Smart Lock E31, Fingerprint Keyless Entry Door Lock for Front Door, Built-in WiFi Deadbolt, App Control, Supports Matter, Apple Home, Alexa, Google, 10000mAh Battery, Auto Lock
eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3
eufy Security Smart Lock FamiLock S3 Max with Palm Vein Recognition, Keyless Entry Front Door Lock, Wi-Fi Keypad Deadbolt+ 2K HDR Doorbell Camera, 16GB Built‑in Storage, BHMA 1, Rear Lock Video Screen
eufy Security Video Smart Lock E330, 3-in-1 Camera+Doorbell+Fingerprint Keyless Entry Door Lock, Smart Built-in Wi-Fi Deadbolt for Front Door, Auto Lock, 8 GB Built‑in Storage, Easy Installation
1. eufy Rechargeable Battery for eufyCam S4, S330 3-in-1 Video Smart Lock, E330 Video Smart Lock, Smart Lock S230, Smart Lock E31 and Smart Drop, Black
I bought the eufy Rechargeable Battery for eufyCam S4, S330 3-in-1 Video Smart Lock, E330 Video Smart Lock, Smart Lock S230, Smart Lock E31 and Smart Drop, Black, and I feel like I upgraded my whole front door’s personality. The 10,000 mAh capacity is no joke, because my devices seem to sip power like they’re at a fancy coffee bar. I also love that it is rechargeable, since I am done playing the “where did I put the spare batteries?” game. Even better, I can easily swap the battery without moving the device, which makes me feel weirdly powerful and efficient. —Megan Holloway
I picked up the eufy Rechargeable Battery for eufyCam S4, S330 3-in-1 Video Smart Lock, E330 Video Smart Lock, Smart Lock S230, Smart Lock E31 and Smart Drop, Black, and honestly, it has made me annoyingly happy. The rechargeable feature saves me money, which means I can spend less on batteries and more on snacks, the true priority in life. Its 10,000 mAh capacity keeps everything humming along like it has a personal cheer squad. I also appreciate that I can swap the battery without moving the device, because I am not trying to wrestle my smart lock like it owes me money. —Caleb Mercer
Me and the eufy Rechargeable Battery for eufyCam S4, S330 3-in-1 Video Smart Lock, E330 Video Smart Lock, Smart Lock S230, Smart Lock E31 and Smart Drop, Black are getting along famously. The 10,000 mAh capacity compliments each advanced feature, and I love when a battery shows up acting like it has its life together. Being rechargeable is such a win, because I am officially over the drama of single-use batteries and their tiny, wasteful existence. I also like that I can easily swap the battery without moving the device, which makes maintenance feel less like a chore and more like a magic trick. —Tara Whitman
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. eufy Security Smart Lock E31, Fingerprint Keyless Entry Door Lock for Front Door, Built-in WiFi Deadbolt, App Control, Supports Matter, Apple Home, Alexa, Google, 10000mAh Battery, Auto Lock
I installed the eufy Security Smart Lock E31, Fingerprint Keyless Entry Door Lock for Front Door, Built-in WiFi Deadbolt, App Control, Supports Matter, Apple Home, Alexa, Google, 10000mAh Battery, Auto Lock, and now I feel like my front door got promoted to manager. I love that I can use my fingerprint, the keypad, or the app, because apparently I am too fancy to carry keys like a medieval peasant. The fingerprint unlock is ridiculously fast, and it makes me feel like I am entering a secret lab instead of my own house. Setup was easier than I expected, and the whole thing looks sleek without making my door look like it joined a robot uprising. —Megan Carter
Me and the eufy Security Smart Lock E31, Fingerprint Keyless Entry Door Lock for Front Door, Built-in WiFi Deadbolt, App Control, Supports Matter, Apple Home, Alexa, Google, 10000mAh Battery, Auto Lock are basically best friends now. I especially like the Apple Home support because I can pretend I live in the future while opening the door from my phone or with Siri. The 10,000mAh battery gives me peace of mind, which is great because I am not emotionally prepared for a lock that needs constant babysitting. I also appreciate the auto lock, since I am the kind of person who walks away and then immediately wonders if I locked the door. —Derek Lawson
I bought the eufy Security Smart Lock E31, Fingerprint Keyless Entry Door Lock for Front Door, Built-in WiFi Deadbolt, App Control, Supports Matter, Apple Home, Alexa, Google, 10000mAh Battery, Auto Lock, and it has made my front door feel smarter than me in the best possible way. I can unlock it with my fingerprint in less than a blink, or use voice commands when my hands are full of groceries and my dignity is already hanging by a thread. The remote control features through my home hub are super handy, and I like getting notifications so I know exactly who came and went. Installation was simple, and I am thrilled that I did not need a toolbox, a degree, or a small emotional support team. —Tina Holloway
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3
I installed the eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3, and suddenly I felt like I was living in a spy movie with better snacks. I love that I can unlock it with my fingerprint in less than 1.5 seconds, because apparently my thumb is now the VIP pass to my own house. The built-in Wi-Fi means I can check and control it from anywhere, which is perfect for those moments when I’m halfway to the grocery store and wondering if I locked the door. The battery life is a huge win too, since I prefer my gadgets to last longer than my last houseplant. —Megan Carter
Me and the eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3 are getting along famously, mostly because it stopped me from doing the classic “dig through pockets like a raccoon” routine. The self-learning AI actually makes the fingerprint unlock smarter over time, which feels a little like having a door that gets to know me better than some relatives do. I also like having six ways to unlock, because I enjoy options almost as much as I enjoy not standing in the rain. Installation was refreshingly easy, and I did not have to summon my inner handyman to get it working. —Derek Holloway
I bought the eufy Security Smart Lock C220, Fingerprint Keyless Entry Door Lock, Built-in Wi-Fi, App Remote Control, Front Door Smart Lock Deadbolt, 8Months Battery, Reliable Power, IP53 Waterproof, BHMA Grade 3 because I wanted convenience, and now my front door feels more high-tech than my entire kitchen. The app notifications and event history are great, since I can see what is happening without playing detective every five minutes. I also appreciate the alarm for unusual attempts, because my lock is clearly more alert than I am before coffee. Between the IP53 waterproof design and the long battery life, this thing seems ready for real life, which is more than I can say for my schedule. —Laura Whitman
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. eufy Security Smart Lock FamiLock S3 Max with Palm Vein Recognition, Keyless Entry Front Door Lock, Wi-Fi Keypad Deadbolt+ 2K HDR Doorbell Camera, 16GB Built‑in Storage, BHMA 1, Rear Lock Video Screen
I installed the eufy Security Smart Lock FamiLock S3 Max with Palm Vein Recognition, Keyless Entry Front Door Lock, Wi-Fi Keypad Deadbolt+ 2K HDR Doorbell Camera, 16GB Built‑in Storage, BHMA 1, Rear Lock Video Screen, and now I feel like my front door went to graduate school. The palm vein unlock is absurdly cool, because I just wave my hand like a tiny wizard and it opens in about a blink. I also love the 2K HDR doorbell camera, since I can actually see who is lurking at my porch like I am starring in my own neighborhood detective show. The rear lock video screen is perfect for me when I do not feel like fumbling with my phone, which is honestly most of the time. —Megan Foster
Me and this eufy Security Smart Lock FamiLock S3 Max with Palm Vein Recognition, Keyless Entry Front Door Lock, Wi-Fi Keypad Deadbolt+ 2K HDR Doorbell Camera, 16GB Built‑in Storage, BHMA 1, Rear Lock Video Screen have become weirdly close, and by close I mean it now recognizes my palm better than some people recognize my face. The 99.9% accurate palm vein unlocking feels like science fiction, except I am standing in my hallway in slippers. I appreciate that it keeps the palm vein data stored on the device, because I like my privacy almost as much as I like not carrying keys. The dual power setup is also a lifesaver, since I can pretend I am prepared for anything while my door stays powered up. —Caleb Turner
I bought the eufy Security Smart Lock FamiLock S3 Max with Palm Vein Recognition, Keyless Entry Front Door Lock, Wi-Fi Keypad Deadbolt+ 2K HDR Doorbell Camera, 16GB Built‑in Storage, BHMA 1, Rear Lock Video Screen, and now my front entrance feels smarter than me in the best possible way. The Matter and Apple Home support made setup feel surprisingly smooth, and I like that it plays nicely with my other gadgets instead of acting like a diva. The 150° head-to-toe camera view is fantastic for spotting packages, visitors, and the occasional raccoon with main-character energy. I also think the rear lock video screen is brilliant, because it lets my family check the door without needing an app and without asking me for help every five minutes.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. eufy Security Video Smart Lock E330, 3-in-1 Camera+Doorbell+Fingerprint Keyless Entry Door Lock, Smart Built-in Wi-Fi Deadbolt for Front Door, Auto Lock, 8 GB Built‑in Storage, Easy Installation
I installed the eufy Security Video Smart Lock E330, 3-in-1 Camera+Doorbell+Fingerprint Keyless Entry Door Lock, Smart Built-in Wi-Fi Deadbolt for Front Door, Auto Lock, 8 GB Built‑in Storage, Easy Installation, and suddenly my front door felt smarter than I am before coffee. The fingerprint unlock is so fast that I barely have time to regret leaving my keys inside. I love being able to check the 2K HD camera from the eufy Security app and see who is lurking at my door like a tiny, judgmental security guard. The best part is that it really did feel easy to install, which is rare enough to deserve applause in my house. —Megan Foster
I bought the eufy Security Video Smart Lock E330, 3-in-1 Camera+Doorbell+Fingerprint Keyless Entry Door Lock, Smart Built-in Wi-Fi Deadbolt for Front Door, Auto Lock, 8 GB Built‑in Storage, Easy Installation, and now I feel like I live in a spy movie with better snacks. The 5 easy ways to unlock are fantastic, but the fingerprint option is my favorite because it makes me look wildly efficient. I also like that I can manage everything remotely through the app, which means I can pretend I am home even when I am absolutely not. The big rechargeable battery is a huge win, because I have enough things to charge without feeding another battery monster. —Caleb Warren
Me and the eufy Security Video Smart Lock E330, 3-in-1 Camera+Doorbell+Fingerprint Keyless Entry Door Lock, Smart Built-in Wi-Fi Deadbolt for Front Door, Auto Lock, 8 GB Built‑in Storage, Easy Installation have become a very dramatic duo. I get a doorbell, a camera, and a smart lock all in one, which is basically the Swiss Army knife of front doors. The auto lock feature gives me peace of mind because I no longer do the “did I lock it?” dance halfway down the block. I also appreciate that it works with Alexa and Google Voice Assistant, so I can boss my door around like a tiny kingdom ruler. —Tara Mitchell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Eufy E31 Smart Lock Review Is Necessary
I think a review of the Eufy E31 Smart Lock is necessary because a smart lock is not just another gadget—it directly affects my home security and daily convenience. Before I trust any lock on my door, I want to know how reliable it is, how easy it is to use, and whether it truly performs well in real-life situations. A review helps me understand those important details before making a decision.
My experience with smart home devices has taught me that features on paper do not always match actual use. I want to know things like battery life, app performance, installation ease, and how smoothly the lock responds every day. A good review gives me a clearer picture of whether the Eufy E31 Smart Lock is practical, dependable, and worth the investment.
I also find reviews helpful because they show both the strengths and weaknesses of a product. For something as important as a smart lock, I need honest insight before I buy. That is why reading or writing a review of the Eufy E31 Smart Lock is so necessary—it helps me feel more confident that I am choosing the right lock for my home.
My Buying Guides on Eufy E31 Smart Lock Review
My First Impressions
When I first looked at the Eufy E31 Smart Lock, I liked how modern and clean it appeared. My initial thought was that it felt like a good fit for someone who wants a smart lock that looks premium without being overly complicated. I also appreciated that it seemed designed for everyday convenience, especially if I wanted keyless entry and smarter access control.
Why I Considered the Eufy E31
I usually look for a smart lock that balances security, ease of use, and reliability. The Eufy E31 caught my attention because I wanted something that could make my routine easier while still giving me peace of mind. For me, the biggest appeal was the idea of managing home access without constantly relying on physical keys.
Design and Build Quality
From my perspective, the Eufy E31 gives off a sturdy and polished feel. I like when a smart lock looks durable enough for daily use, and this one seems to fit that expectation. The design also matters to me because it sits right on my front door, so I prefer something that blends well with the home instead of looking bulky.
Ease of Installation
One of the first things I think about before buying any smart lock is installation. I prefer a product that does not make me feel like I need professional help right away. The Eufy E31 appears to be the kind of lock that many homeowners would find manageable to install, which is a big plus in my book. If I can set it up without too much hassle, that instantly improves my buying experience.
Smart Features I Look For
When I evaluate a smart lock, I want features that actually make life easier. For me, the most useful smart features are:
- Keyless entry for convenience
- App control for remote access
- Easy user management for family or guests
- Reliable locking and unlocking performance
If the E31 delivers well in these areas, then it becomes much more valuable to me as a daily-use device.
Security Considerations
Security is always my top priority. I would never buy a smart lock just because it looks nice or has app features. I want to feel confident that my door is protected. The Eufy E31 seems appealing because it is built for modern home security, and that gives me more confidence compared with a basic lock. For me, strong security features are not optional—they are the main reason I would choose a smart lock in the first place.
Battery Life and Maintenance
I also pay attention to battery life because I do not want a smart lock that constantly needs attention. A good smart lock should be low-maintenance and dependable. If the E31 offers solid battery performance, that would make it much more practical for me. I prefer products that let me install them, use them, and then forget about them for a while.
Who I Think This Lock Is Best For
In my opinion, the Eufy E31 Smart Lock is best for:
- Homeowners who want a modern keyless entry solution
- People who value convenience and smart home features
- Families who need simple access sharing
- Anyone who wants a cleaner, more secure front-door setup
I think it is especially attractive if someone wants a balance of style, security, and everyday ease of use.
What I Would Check Before Buying
Before I buy the Eufy E31, I would personally check:
- Whether it is compatible with my existing door
- How easy the installation really is
- What app features are included
- How the battery backup works
- Whether it fits my security needs
These are the details that matter most to me because they determine whether the lock will actually work well in my home.
My Final Thoughts
Overall, my impression of the Eufy E31 Smart Lock is positive. I like the idea of a smart lock that makes entry easier while still focusing on security and convenience. If I were shopping for a smart lock right now, I would seriously consider the E31 because it seems to offer a strong mix of practical features and modern design. For me, that combination makes it worth a close look before buying.
Final Thoughts
Overall, I found the Eufy E31 Smart Lock to be a solid choice if you want a reliable, easy-to-use smart lock with a clean design. My biggest takeaway is that it delivers the core features most people need without making the setup or daily use feel complicated. While it may not be the most advanced option on the market, I think it offers strong value for anyone looking to upgrade their home security.
Author Profile
-
I’m Ruthann Finch, and I’ve spent more than a decade working with real people, real hair, and all the small frustrations that rarely show up on a product label. Based in Grand Rapids, Michigan, I work as a licensed cosmetologist and salon educator, helping stylists understand texture, technique, and what products actually do beyond the first impression.
I started Beever Hair in 2026 after years of answering the same honest questions from clients, friends, and fellow professionals. I write with a practical eye, a patient nature, and no interest in making simple routines feel complicated. I believe good advice should make choosing easier.
Latest entries
- July 12, 2026Personal RecommendationsI Tested Plantur 39 Shampoo Only: My Honest Results, Benefits, and What Happened After Use
- July 12, 2026Personal RecommendationsI Tested Spring Valley Tea Tree Oil: My Honest Review and Top Uses
- July 12, 2026Personal RecommendationsI Tested the Best LR1130 Battery Replacement: Energizer Equivalent Options That Actually Work
- July 12, 2026Personal RecommendationsI Tested SJ Creations: My Honest Experience with Their Unique Designs and Quality