Smart Door Lock Features Explained

Modern smart locks are packed with features — but which ones actually matter day to day? Covlor® explains the most useful smart lock features, from auto-lock and temporary passwords to remote unlock and entry logs, so you know exactly what to look for.

Auto-Lock

The lock re-secures itself a few seconds after the door closes, so you never leave it unlocked by mistake — arguably the single most valuable everyday feature.

Temporary & One-Time Passwords

Issue a time-limited or single-use code for guests, deliveries, or staff. It expires automatically, so there is no key to collect and no lingering access.

Remote Unlock

With a Wi-Fi lock, you can open the door from your phone anywhere — perfect for letting in family or a courier while you are out.

Anti-Peep Password

Add random digits before or after your real PIN so anyone watching cannot learn your code — strong protection in shared corridors.

Entry Logs

See who entered and when, straight from the app. Great for keeping an eye on children arriving home or staff access at work.

Tamper Alarm

A loud alarm sounds on prying or repeated wrong attempts, deterring intruders and alerting neighbours.

Feature Quick Reference

Which Features Do You Need?

Prioritise auto-lock and strong access options for every home; add remote unlock and logs if you value control and visibility. See how these appear across models in our buying guide and browse the shop.

Biometric Access: Fingerprint, Face and Palm

The headline feature of a modern smart lock is biometric entry. Fingerprint is the fast, personal everyday method — a capacitive sensor reads dry, cold or damp fingers reliably. Face recognition opens the door hands-free, ideal when your hands are full, and the best systems use 3D sensing with liveness detection. Palm recognition adds touch-free, hygienic entry that works even when fingers aren’t ideal for scanning.

Covlor builds fingerprint, face and palm recognition across its lineup, so every household member has a method that suits them. Layered biometrics mean you’re never stuck at the door. Our biometric door lock guide compares each method.

PIN and Card Access for Guests

Biometrics are the everyday method, but codes and cards add flexibility. A PIN keypad lets you issue temporary codes to guests, help and deliveries, and revoke them at will, while an RFID card offers simple tap entry that’s ideal for children and elderly relatives who find biometrics fiddly.

Together these give everyone a convenient way in and make managing visitors effortless — no spare keys to cut or chase down afterwards.

App Control and Remote Management

A connected lock puts control in your pocket. Through the app — Covlor uses the established Tuya and Smart Life platforms — you can unlock remotely for a trusted visitor, create and revoke digital keys and codes, add or remove users instantly, and check battery status, all from anywhere.

For a busy household or anyone who travels, this turns “I’m not home” from a problem into a non-issue. Our app guide explains what the app can do.

Auto-Lock in Detail

Auto-lock is one of the most valuable everyday features. Because the bolts are motor-driven, the lock extends them automatically after the door closes or a set delay, so the door is never accidentally left unlocked. For families juggling bags, children and school runs, it quietly closes a common security gap.

You can usually set the delay to suit your routine. A handle-operated lock can’t lock itself, which is one reason a fully motorised smart door lock is both safer and more convenient.

Emergency USB-C Power and Mechanical Key

The features that matter most are the ones you hope never to need. Covlor locks offer emergency USB-C power — touch a power bank to the lock to open it if the battery ever runs flat — plus a concealed mechanical key as the ultimate backup. Combined with early low-battery warnings, these ensure a dead battery never means a lockout.

When comparing locks, treat a clear emergency-power path and a mechanical key as essential, not optional.

The All-Metal Gear Motor

A feature you can’t see but will feel for years is the motor. It drives the bolts on every entry, so its durability decides how long the lock lasts. Covlor uses an all-metal gear motor rather than plastic gears, which lasts roughly twice as long and resists the wear that causes budget locks to fail.

A durable motor also runs efficiently, helping battery life. It’s the quiet engineering choice that separates a lock built to last from a disposable one.

Multi-Bolt Body and Anti-Tamper Build

Security lives in the body. A multi-bolt design — four or five bolts engaging the frame at several points — spreads force and resists forcing or prying far better than a single bolt, and anti-tamper hardware resists levering. Covlor drives these bolts with its motor rather than a rotating handle, for a stronger, fully automatic action.

This is the feature that actually keeps intruders out, so it deserves as much attention as the biometrics.

Guest, Scheduled and One-Time Access

Flexible access management is a standout feature for busy homes and rentals. You can issue a permanent code to family, a scheduled code to a maid that only works during her hours, and a one-time OTP to a courier — then revoke any of them instantly from the app, with no re-keying.

A timestamped access log shows exactly who entered and when, adding accountability. This granular control is something a physical key can never offer.

Smart-Home Integration

Because Covlor locks use the Tuya and Smart Life ecosystem, your lock can work alongside other smart-home devices — for example, arriving home can trigger lights or scenes as part of a routine. The lock becomes part of a connected home you manage from one familiar app, rather than an isolated device.

Integration is an optional bonus rather than a necessity, but for smart-home users it makes the lock noticeably more useful.

Which Features Matter Most for You

Not every home needs every feature. A large family values several access methods and easy management; a frequent traveller values Wi-Fi, alerts and remote unlock; a rental host values scheduled and one-time codes; and everyone benefits from a durable motor, multi-bolt body and reliable emergency power.

List what your household actually needs, then match a lock’s features to that list. Our best smart door lock guide helps you compare models against your priorities.

Low-Battery Warnings You Can Rely On

A small but important feature is how a lock handles power. Quality locks warn you in several ways — an on-device indicator or voice prompt, and an app notification on connected models — giving days or weeks of notice before the battery runs low. You recharge or replace at your convenience, never caught out.

Covlor’s rechargeable lithium packs last roughly 6 to 10 months per charge, so these warnings appear only occasionally. Acting on the first one means a flat battery never becomes a problem.

Voice-Assistant and Routine Compatibility

For smart-home users, voice and routine features add convenience. Through the Tuya and Smart Life ecosystem, you can check whether the door is locked as part of a routine, or include the lock in scenes alongside lights and other devices. Any voice unlocking should always require secure confirmation to stay safe.

These touches make the lock feel like a natural part of a connected home rather than a standalone device, though they remain an optional bonus rather than a core security feature.

Multiple User Profiles and Credentials

A capable smart lock stores plenty of individual users and credentials — fingerprints, faces, codes and cards — enough for a large or joint family and comfortably enough for a small office. Each person gets their own profile, so you can see who entered and remove any one credential instantly without affecting the others.

This per-person control is what makes a smart lock suitable for busy households and workplaces alike, and far more flexible than a single shared key.

Weatherproofing and Build Durability

Features aren’t only digital. A good lock is built to survive real conditions — heat, humidity and daily knocks — with robust, corrosion-resistant hardware and a sealed design. Covlor’s multi-bolt body and all-metal gear motor are engineered for years of reliable use, which matters as much as any software feature.

When comparing locks, weigh build durability alongside the headline features; the strongest feature list means little on a flimsy body.

Mobile-Key Sharing and OTP

Sharing access is a feature families and hosts use constantly. Through the app you can send a trusted person a digital key or a one-time password (OTP) that works once or for a set window — perfect for a courier, a tradesperson or a weekend guest — then expires or is revoked automatically.

No physical handover, no spare key to retrieve afterwards. It’s one of the most practical everyday features of a connected smart door lock.

Entry and Exit Logs in Detail

The access log is one of the most useful connected features. Every entry is recorded with a timestamp and the person or method used, so you can confirm a child arrived home, check when a cleaner came, or review activity if anything seems off. On a busy household or office door, this record provides accountability a key simply can’t.

Logs sync to the app so you can review them from anywhere, turning your smart door lock into a quiet, always-on record of comings and goings.

Choosing Only the Features You Need

With so many features available, the skill is choosing the ones you’ll actually use. Prioritise the fundamentals — reliable biometrics, a strong multi-bolt body, a durable motor, dependable battery and emergency power — then add the conveniences that fit your life, whether that’s Wi-Fi alerts, scheduled codes or smart-home integration.

A lock matched to your real needs beats one chosen for the longest feature list. Our guide to the features that matter helps you decide which to prioritise.

Frequently Asked Questions

What is the most useful smart lock feature?

Auto-lock, because it removes the most common security mistake — forgetting to lock the door.

What is a temporary password on a smart lock?

A code that works only for a set time or a single use, ideal for guests and deliveries, then expires automatically.

Can I unlock my smart lock remotely?

Yes, with a Wi-Fi smart lock you can unlock from your phone anywhere with internet.

What is an anti-peep password?

It lets you add random digits around your real PIN so onlookers cannot capture your actual code.