Front entrance of a house with a black lever-handle smart door lock installed on a timber door, rendered walls and door frame clearly visible

Fingerprint vs Keypad Code: Which Entry Method Actually Wins on a Front Door

Most smart locks on a standard Australian home give you both a fingerprint reader and a keypad code, so the real question isn't which one to buy — it's which one you'll actually reach for when your hands are full of groceries, a guest needs a way in while you're at work, or the battery light has been blinking for a week. This guide compares the two on the things that matter day to day: speed, reliability, security, and what happens when either one fails.

⭐ Key Takeaways

  • A fingerprint is generally the more secure option, since it can't be shared, forgotten, or watched over someone's shoulder — but it depends entirely on sensor quality.
  • A keypad code is more flexible: it can be shared over the phone, changed in seconds, and doesn't care about wet, cold or injured fingers.
  • Fingerprint sensors can become less reliable in extreme heat, humidity, or with sweaty or dry skin — a real seasonal issue, not a manufacturing fault.
  • A "virtual password" feature lets you pad a real code with random digits, so someone watching you type still can't work out your actual PIN.
  • The two methods solve different problems — most households end up using both, on the same lock, for different people.
  • Every smart lock in this range keeps a mechanical key as the final fallback, regardless of which digital method you prefer day to day.

What a Fingerprint Actually Gets You, Day to Day

On the Smart Door Lock — Fingerprint & Code, the fingerprint sensor reads in under half a second and stores up to 100 prints on the lock itself, not in a cloud account somewhere. In practice that means everyone in the household gets their own print enrolled once, and from that point on getting in is a single touch — no digits to remember, no card to fish out of a bag.

The security case for fingerprints is straightforward: a fingerprint can't be shared, can't be forgotten, and can't be observed and copied the way a four-digit code can be watched and memorised by someone standing nearby. It's tied to a specific person in a way a code never is. That's a genuine advantage for a front door that sees a lot of foot traffic — kids arriving home from school, a partner with their arms full, a dog walker who needs reliable daily access.

The trade-off is that a fingerprint reader is only as good as the sensor behind it, and semiconductor capacitive sensors — the type used in this price range — read the electrical properties of skin, which change with moisture, temperature and general wear. That's not a flaw specific to any one lock; it's a property of the technology, and it's worth understanding before you decide how much to rely on it.

Close-up of a finger touching the fingerprint reader on a black lever-handle smart door lock

What a Keypad Code Actually Gets You

A keypad code solves a different problem: access for people who aren't physically enrolled on the lock. Tell a tradesperson a temporary code over the phone before they arrive, give the house-sitter a code that works for the two weeks you're away, or let a teenager in on the one day they forgot their key — none of that requires them to touch the lock in advance.

Codes also don't care about the weather or the state of your hands. A fingerprint sensor can genuinely struggle to read a wet, cold, sweaty or heavily calloused finger; a keypad code works exactly the same in a heatwave, a wet Melbourne winter, or after a day of gardening. If reliability in all conditions matters more to you than speed, a code is the more dependable of the two.

The one real weakness is observation. A four-to-six digit code typed in view of a doorway, a security camera angle, or a neighbour's window can be watched and memorised — this is the same "shoulder-surfing" risk that applies to phone PINs and ATM codes, and a front door is no more immune to it than a phone screen. The SL-H1 and most locks in this range address it with a virtual password feature: you type extra random digits before or after your real code, and the lock still reads the correct sequence. Anyone watching sees a long, meaningless string of numbers instead of your actual PIN.

Entry method Speed Can be shared remotely? Main weakness
Fingerprint Under 0.5 seconds No — needs enrolment in person Sensitive to heat, moisture and skin condition
Keypad code A few seconds Yes — tell someone the digits Can be observed if typed in view of others
RFID / NFC card Instant tap Physically, by handing it over Can be lost or copied if not deactivated
TTLock app A few seconds Yes — digital key sharing in-app Needs Bluetooth range, or the G2 gateway for remote use
Mechanical key A few seconds Physically only The one method every household forgets to keep spare

💡 Did You Know?

A virtual password isn't a gimmick — it's a real answer to a real problem. Say your actual code is 4471. Instead of typing exactly that in view of the street, you might type 918447162 — any string that contains your real digits in order, padded with extra numbers before, after, or both. The lock strips the padding and reads the correct code underneath. Someone watching you type has no way to tell which digits mattered.

Black lever-handle smart door lock, outer keypad panel with fingerprint reader and inner panel

✓ Our Pick

Smart Door Lock — Fingerprint & Code

Five ways in — fingerprint, code with virtual-password support, RFID card, TTLock app and a mechanical key — plus a doorbell built into the outside panel.

$349.99 AUD

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When Fingerprints Actually Let You Down

Fingerprint sensors interact with the electrical properties of skin, and those properties shift with moisture, temperature and dryness. In practice, that means read failures tend to cluster at two predictable points in the year: dry winter conditions, when skin loses moisture and the ridges the sensor relies on become less distinct, and hot, humid summer days, when sweaty hands do the same thing from the opposite direction. Neither is a fault with the lock — it's a known limitation of capacitive fingerprint sensors generally, and it's worth knowing before you rely on a fingerprint as your only method.

A few habits reduce the problem. Wiping the sensor with a dry microfibre cloth before use clears the oil and dust film that interferes with a clean read. If your household includes someone whose skin changes noticeably with the seasons — very dry hands in winter, for instance — re-enrolling that fingerprint at the start of each season gives the sensor a fresher reference point, rather than one captured under a single set of conditions. A minor cut, a callus that's worn down, or a manicure can also throw off a previously reliable print, which is exactly the scenario the keypad code exists to cover without missing a beat.

When a Code Is Simply the Better Tool

There are situations where reaching for a fingerprint isn't even possible — anyone who hasn't been physically enrolled on the lock. A tradesperson, a delivery driver who needs one-time access, a relative visiting for the first time, or a cleaner who comes fortnightly rather than daily: all of them are better served by a code you can communicate over the phone or a text message than by a fingerprint that requires an in-person enrolment session first.

Codes are also instant to change. If a code has been shared more widely than you'd like — after a party, at the end of a short-term rental, or once a tradesperson's job is finished — updating it takes a few seconds through the keypad or the app, and the old code stops working immediately. Revoking a fingerprint means physically deleting it from the lock's memory, which is just as fast in practice but does require the lock in front of you rather than a phone screen.

Who's using it Best method Why
Household members, daily use Fingerprint Fastest, nothing to remember or lose
Tradesperson or one-off visitor Temporary code No enrolment needed, easy to revoke
Kids without a phone yet Fingerprint or RFID card No code to forget or share at school
Someone with very dry or wet-prone hands Keypad code Unaffected by skin condition
House-sitter or short-term guest Temporary code, deleted on departure No lasting access left behind
Lever-handle smart door lock with adjustable 60-70 mm latch, shown in silver and in black

✓ Also Consider

Smart Door Lock — Lever Handle, Adjustable 60–70mm

Same five-way entry, plus higher user capacity — 9 admins and 291 users — better suited to a share house or small office than a single-family front door.

$399.99 AUD

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Combining Both Beats Choosing One

The honest answer is that this isn't really a fingerprint-versus-code decision — every lock in this range offers both, plus an RFID card, an app and a mechanical key, and the sensible approach is to let each person and each situation use whichever method fits. Enrol fingerprints for the people who live there and pass the door several times a day. Keep a code in reserve for the days a fingerprint doesn't read, for visitors who haven't been enrolled, and for anyone whose hands aren't cooperating with a sensor that morning. Use the virtual-password feature whenever you're entering a code somewhere it could be observed.

What matters more than the fingerprint-versus-code debate is making sure the lock you choose actually fits your door in the first place — our sizing guide walks through measuring the backset before you order, and the buying guide compares every model in the range side by side, including the weatherproof options if your entry door takes direct rain.

Family entering a front door using a smart lock keypad, hands full with shopping bags

Discover Our Smart Lock Door Handles

Smart Lock Door Handles

Lever-handle smart locks that replace the tubular latch already in your door — the easiest upgrade in the range, with fingerprint, code, card, app and key entry built in.

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Frequently Asked Questions

Is a fingerprint lock more secure than a keypad code?
Generally yes — a fingerprint can't be shared, forgotten or copied by someone watching you enter it, which a keypad code can be if it isn't protected with a virtual password. Security in practice also depends on sensor quality and how consistently you use the virtual-password feature for your code.

Why does my fingerprint sometimes fail to read?
Fingerprint sensors read the electrical properties of skin, which change with moisture, temperature and general wear. Very dry winter skin, sweaty summer hands, a fresh cut or a worn callus can all cause a temporary misread — it's a known property of the sensor technology, not a fault.

What is a virtual password, and how does it stop shoulder-surfing?
It lets you pad your real code with extra random digits typed before, after, or on either side of it. The lock reads only the correct sequence underneath; anyone watching you type sees a long, meaningless string and can't work out your actual code.

Can I share access without giving someone a fingerprint or a key?
Yes — a temporary keypad code is the easiest way to give someone time-limited access without an in-person enrolment session. Set it, share the digits, and delete it once they no longer need entry.

How many fingerprints and codes can these locks store?
The Fingerprint & Code model stores up to 100 fingerprints on the lock itself. The adjustable-latch model supports up to 9 administrators and 291 total users, which suits a share house, holiday let or small office better than a single-family entry.

What happens if neither the fingerprint nor the code works?
Every lock in this range includes a mechanical key as a backup, supplied with the lock, plus a USB-C emergency port on the outside face — touching a phone power bank to it wakes a flat battery long enough to unlock normally.

Key Takeaways