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eufy Security Smart Lock C220
A fingerprint smart lock with built-in WiFi, from an established smart-home brand with a broader device ecosystem.
Check Price →In Plain English
The C220 is a front-door deadbolt you can open with your fingerprint instead of a key. Think of it like the fingerprint unlock on many phones, but fitted to your door. It also has a number keypad, an app and an ordinary key as back-ups, so one failed method does not leave you stuck outside.
It connects to your home WiFi by itself, so you can lock or check the door from your phone without buying an extra box (a hub). The trade-off is battery use: the WiFi radio drains the eight AA batteries faster than a lock with no connection, and eufy rates them at about eight months. The one thing to check before buying is your door: measure the backset (the distance from the door edge to the centre of the lock hole) and the door thickness against the listed range. Then keep the spare key somewhere you can reach.
C220 Full Specifications
| Entry method | Fingerprint, keypad, app, physical key |
| Connectivity | Built-in WiFi |
| App | eufy Security app |
| Batteries | 8 AA, rated around 8 months |
| BHMA grade | Grade 3 |
Rating and Summary
The eufy Smart Lock C220 holds a solid rating across a deep base of verified owner ratings. It's a fingerprint-entry lock with built-in WiFi. It comes from a brand with an established broader smart-home ecosystem, spanning cameras, sensors and other connected devices. The rest of this review works through design, connectivity, installation, battery life, security and the app experience in turn. It's grounded in what verified owners actually report after living with the lock on their own door.
Design, Fingerprint Sensor and Keypad
The C220 uses a compact exterior faceplate housing the fingerprint sensor and a small backlit keypad. It sits over a standard deadbolt body that matches typical US door prep. Owner photos and reviews describe a finish that holds up reasonably well to outdoor exposure. As with any smart lock, though, a fully covered entry sees less weathering than one exposed to direct sun and rain. It's a residential-scale design aimed at a front or back door on a house or apartment, not a heavy-duty commercial application. The interior assembly houses the battery compartment and the radio hardware that keeps it talking to your network.
WiFi Connectivity and Remote Access
Built-in WiFi is the C220's headline connectivity feature. It pairs directly to your home network during setup. No separate eufy HomeBase or bridge accessory is required for basic app-based remote lock, unlock and activity alerts. That's a genuine advantage over locks that need a separate hub purchase to unlock remote access at all. Owners already running other eufy cameras or sensors get an added benefit too. They manage everything through one eufy Security app, rather than juggling a lock-specific app alongside the rest of their setup.
Installation and Retrofit
Like the vast majority of smart locks on this hub, the C220 is designed as a direct retrofit for a standard US deadbolt hole. Most owners report installing it in well under an hour, with a Phillips screwdriver and no locksmith needed. Measure your door's backset and thickness against the listed compatibility range before ordering. See our full how to install a smart lock walkthrough for the general retrofit process this lock follows, including calibration and app pairing.
Battery Life
The built-in WiFi radio draws more continuous power than a Bluetooth-only or purely offline keypad lock. That's worth factoring in against simpler alternatives if maximum battery life between changes is a priority for you. eufy rates the C220 at around eight months on eight AA batteries, depending on how often it's used. The lock gives a low-battery warning well ahead of a full drain, and the physical backup key covers you if it ever runs flat. Standard batteries are cheap and widely available, so it's an inconvenience rather than a real risk of lockout.
Security and ANSI Grade
The deadbolt mechanism itself, not the fingerprint sensor or app layer, is the more meaningful security measure. eufy lists the C220 as BHMA Grade 3 certified — the third of BHMA's three numbered grades, where Grade 1 is the highest — so don't assume a smart lock's electronics substitute for solid bolt hardware. eufy's broader security-camera and sensor product line gives it an established general reputation for security-focused hardware, which shows up in owner trust.
App and eufy Ecosystem
The eufy Security app handles code management, activity logs and remote access for the C220. It doubles as the same control point for any other eufy devices already in the household. That unification is the app's clearest strength for existing eufy owners. For a first-time eufy buyer, the app experience is comparable to most competing smart-lock apps. It's functional and focused on the essentials rather than especially elaborate, per the aggregated feedback in owner reviews, with occasional connection hiccups noted by a minority of users.
Price and Value
The C220 sits in the budget-to-mid tier of this hub's fingerprint-lock range. It's priced below fully premium WiFi deadbolts like Schlage Encode, while still including built-in WiFi that some rivals reserve for a pricier tier or a separate accessory. Check the current listing for the current price, since it shifts. The combination of fingerprint entry and no-hub WiFi at this price point is a genuine part of the value case, according to how owners consistently frame it across their own reviews.
What owners praise
Fingerprint recognition speed and reliability are the most frequently cited positives. Built-in WiFi removing the need for a separate hub purchase is another. Owners already running other eufy devices specifically praise the unified app experience. Several reviews call out the straightforward install process as better than expected for a first-time smart-lock buyer.
What owners complain about
Some reviews note fingerprint sensors can struggle with wet or dirty fingers. That's a limitation common across the fingerprint lock category, not specific to this particular product — a keypad backup is the practical fallback. A minority mention wanting more granular notification controls in the app. A smaller number note the WiFi connection occasionally drops and needs a manual reconnect to restore normal function.
Who It’s For
Buyers who want fingerprint entry with built-in WiFi, particularly if already running other eufy smart-home devices and want one app covering the whole household. It's also a reasonable pick for a first-time smart-lock buyer. You get remote access working immediately, without researching a separate hub purchase before ordering.
Who Should Skip It
If you want the deepest-reviewed fingerprint lock specifically, see best fingerprint lock for the TEEHO TE002 comparison. If maximum battery life matters more than built-in WiFi, a simpler Bluetooth-first or keypad-only lock is worth comparing directly against the C220 before you decide.
Pros and Cons
Pros: built-in WiFi with no separate hub needed, fingerprint entry backed by a reliable keypad fallback, established smart-home ecosystem, solid review base, straightforward retrofit installation.
Cons: fingerprint sensor limitations with wet or dirty fingers common to the category, app notification controls could be more granular, WiFi draws more battery than a connectivity-free lock.
Going Deeper: How a Fingerprint Lock Decides It’s You
Fingerprint systems do not compare photos of your finger. According to NIST’s guide to its fingerprint software, fingerprints have traditionally been compared using minutiae (the points where a ridge ends or splits in two), and a matcher records the location of each of those points and the direction of the ridge running through it. Matching then becomes a question of how many of those points line up between the stored template and the finger on the sensor, which is why a partial touch can still work, and also why it sometimes does not.
Image quality is the weak link. NIST notes that as fingerprint image quality degrades, so does matcher performance. That is the technical reason behind the complaint in owner reviews that wet, dirty or cold fingers get rejected: water and grime blur the ridges, so the sensor sees fewer clean minutiae to compare. It is also why the keypad fallback matters so much. A false rejection is an inconvenience rather than a lockout, as long as a second method exists.
eufy’s own claims fit this picture. eufy’s product page says the C220 recognises a fingerprint in under 0.3 seconds, stores up to 50 fingerprints, and gets more precise with every touch by analysing the most-used prints during each press. On the hardware side, eufy says the lock earned BHMA Grade 3 certification after being locked and unlocked more than 100,000 times. BHMA explains that its grades run from 1 to 3, with Grade 1 the highest, based on progressive performance benchmarks. So the fingerprint reader adds convenience, while the grade tells you about the bolt behind it.
Verdict and Review Base
A well-evidenced fingerprint smart lock, particularly strong for buyers already invested in the eufy ecosystem. See a ranked list of fingerprint locks for the full field.
Alternatives to Consider
- Kwikset SmartCode 270 review
- Schlage Encode review
- Best Smart Lock — the full ranked field
Sources & References
- eufy Smart Lock C220 — eufy (Anker)
- Product grade levels — Builders Hardware Manufacturers Association (BHMA)
- 270 SmartCode Traditional Electronic Deadbolt specifications — Kwikset
- User’s Guide to NIST Biometric Image Software (NBIS) — National Institute of Standards and Technology