TMEZON Smart Door Lock, Fingerprint Smart Lock for Front Doo

The Verdict

The $38 Smart Lock That Actually Works — With One Big Caveat

Here’s the thing about budget smart locks: most are either glorified keypads with janky electronics, or they’re so cheaply built you can feel the flex in the housing. The TMEZON Smart Door Lock is neither. It’s a legitimate standalone fingerprint deadbolt that undercuts the competition by $60–100 — and for the most part, it earns its keep.

What’s Actually in the Box

The package includes the exterior keypad assembly, interior thumb-turn unit, a standard ANSI/BHMA deadbolt latch (2-3/8" and 2-3/4" backset adjustable), strike plate, all mounting screws, and four AA batteries. Notably, there’s no physical key override — if the batteries die and you haven’t set up the 9V emergency power port on the bottom, you’re calling a locksmith. That’s a genuine design consideration you need to weigh.

The lock replaces your existing deadbolt with minimal fuss, but here’s the catch: it requires a 2-1/8" diameter bore hole and a 1" crossbore. If your door was pre-drilled for a standard deadbolt, you’re fine. If you’re working with an older door, measure before you buy.

Real-World Performance

I tested this lock for three weeks on a standard fiberglass entry door. Fingerprint recognition is genuinely quick — the capacitive sensor reads in roughly half a second on clean, dry fingers. It stored 20 fingerprints (the max) without issue, and the 50-code keypad memory handles the rest. The auto-lock feature (adjustable from 10 to 99 seconds) works as advertised, which is rare at any price.

The motor is surprisingly quiet — a soft whir rather than the clunky thunk you get from cheaper units. The interior thumb-turn is solid, not wobbly. Battery life is rated at 8–10 months with normal use, and the low-battery alarm gives you a decent heads-up before you’re locked out.

What Buyers Keep Praising

The 4.1-star rating across 204 reviews reflects genuine satisfaction. One verified buyer put it simply: “Installed in 20 minutes. Fingerprint works every time, and the price is unbeatable.” Another noted, “I bought two — one for the front door and one for the rental property. Guests love not needing a key.” The common thread: people are consistently surprised at how well it performs for the price.

Where It Falls Short

The fingerprint sensor has quirks. Wet fingers after rain or dishwashing? Expect failed reads. Dry winter skin? Same problem. You’ll fall back on the keypad code — which is fine, but defeats the purpose if you bought this specifically for fingerprint convenience.

The bigger issue is the lack of smart connectivity. No Wi-Fi, no Bluetooth, no app, no integration with Alexa or Google Home. This is a standalone smart lock, not a connected one. If you want remote access or activity logs, look elsewhere — the August Wi-Fi Smart Lock or Schlage Encode are better (and much pricier) options.

Who Should Buy This

• Renters and landlords: Easy to install, no permanent wiring, and you can reset codes between tenants. The price means you can outfit multiple properties without flinching.
• Budget-conscious homeowners who want keyless entry without the subscription fees of cloud-connected locks.
• Anyone with a side or garage door who wants convenience without overthinking it.

Skip it if you need app-based remote access, have very dry or sweaty hands that consistently fail fingerprint reads, or you’re not comfortable with the no-physical-key fail-safe.

FAQ

Does this lock fit a standard US door? Yes — it fits 1-3/8" to 2" thick doors with a standard 2-1/8" bore hole. Measure your door’s backset (2-3/8" or 2-3/4") and adjust the latch accordingly.

What happens when the battery dies? You’ll get a low-battery warning beep for about two weeks. Once dead, use the 9V battery terminal on the bottom exterior to power it up temporarily. There’s no key override.

How many codes and fingerprints can I store? Up to 20 fingerprints and 50 PIN codes. That’s plenty for a family or small rental property.

The Verdict: 4.2/5 — Buy it if you want reliable keyless entry without smart-home complexity. Skip it if you need remote access.

Buy it if: You want a genuinely functional fingerprint lock at a fraction of the cost of name brands, and you’re okay with a standalone unit.

Skip it if: You need app control, have problematic fingerprint conditions, or want the peace of mind of a physical key backup.

At $37.99, this is the best value smart lock I’ve tested in this price band. It’s not perfect, but it’s honest — and that’s refreshing.

Where to Buy

👉 Check Price on Amazon →

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.