Are smart locks worth it?

What they are genuinely good at

Granting and withdrawing access without physical keys. A code for a contractor that expires on Friday. A code for a cleaner that you cancel from your phone. Access for staff without another key entering circulation.

Most keep a log, so you know a door was opened at 14:20 rather than guessing. For anyone letting a property or managing recurring third-party access, that alone can justify the cost.

What they do not do

They do not make a door harder to force. Physical resistance comes from the bolt, the frame, the strike plate and the fixings, and some smart locks sit on very ordinary mechanisms underneath the electronics.

If the door can be forced, a smart lock is a convenience purchase — a perfectly reasonable thing to buy, provided it is not mistaken for security spending.

Batteries and outages

Every smart lock is a battery-powered device on the outside of a building. Batteries go flat at the least convenient moment, and better models warn for weeks — find out exactly what that warning looks like before relying on it.

Battery-powered models carry on through a power interruption, which is the main argument for them over anything mains-dependent. Anything wired needs its outage behaviour established before installation.

Insist on the mechanical override

A lock whose only route in is electronic is a lockout waiting for a flat battery — one of the more avoidable reasons to need a locksmith. Anything that genuinely cannot wait is handled as an emergency locksmith call, at any hour.

We fit smart locks with a physical key path wherever the hardware supports one, and would think hard before fitting one that does not.

For a business, count the doors first

One or two doors, a standalone smart lock is a reasonable answer. Beyond that it stops being cheaper. Six locks means six apps, six battery schedules and six places a departing employee's access might survive.

At that point proper access control is usually less expensive to administer and far easier to audit, because credentials live in one system. We will say so even though it is the bigger job. Body corporates and offices are covered by commercial locksmith services.

The fitting decides how long it lasts

Most smart lock disappointments are installation problems. A motorised bolt fighting a door that has dropped drains batteries quickly and eventually fails outright.

The door has to be right before the lock goes on. Any installer who does not check alignment first is booking a callout in six months.

What a smart lock is actually good at

The honest case for a smart lock is not security. It is access management, and on the right door that is genuinely valuable.

A code or a credential can be issued to a cleaner for Tuesday mornings and withdrawn on Wednesday. A contractor can be given access for the duration of a job without anybody meeting them with a key. A holiday rental can hand over without a key exchange at all. None of that is possible with metal, and no amount of good intentions makes a key temporary.

So the question is not whether a smart lock is more secure than a good cylinder. It is whether you have an access problem that keys cannot solve. If people come and go on a schedule, the answer is frequently yes; if the same four people have used the same door for ten years, it is almost always no.

The questions to ask before buying one

Five, and the answers decide whether a product belongs on your door.

What happens when the battery dies — is there a mechanical override, and where does its key live? What happens during load shedding, and does the door fail locked or unlocked? Is the mechanical part of it any good, because a smart lock is a motor attached to a lock and the lock underneath still has to be a proper one?

Does it need an account and an app to function, and what happens to the door if that service is discontinued in five years? And is the manufacturer likely to still exist then? That last question sounds unfair and it is the one that most often turns out to matter.

Estates, complexes and what you may fit

In a complex or a cluster the decision is not entirely yours, and it is worth finding out before you buy rather than after.

Most bodies corporate regulate anything visible from common property, which includes the appearance of a front door and its hardware. A smart lock is highly visible, so approval is frequently needed, and trustees meet on a schedule rather than on demand.

The tidier route in a regulated development is a product that keeps the original cylinder as its mechanical override. The door then still accepts a key, removal at some future point is genuinely simple, and the appearance question is far easier to answer. It also means a lock change remains possible without removing anything electronic.

Where a smart lock is the wrong answer

On an outdoor gate in this climate. Anything electronic facing Highveld dust and summer storms — which is to say anything outdoors in Johannesburg, Gauteng — lives a harder life than the manufacturer's testing assumed, and gates get more use than front doors.

On a door where the underlying mechanism is worn out, because a motor turning a failing lock fails faster than a hand does. On a door protecting something genuinely valuable, where a well-specified mechanical high-security cylinder still outperforms most consumer electronics.

And on any door where nobody has decided who administers it. A smart lock with three people who can add credentials and no record of who added what is a worse access arrangement than a key register, not a better one.

The hybrid arrangement most people should choose

For most households the sensible answer is neither all-mechanical nor all-electronic.

Keep a properly specified mechanical lock on the main door, and put the electronic convenience where the access problem actually is: a pedestrian gate, a garden gate that a service uses, an outbuilding a contractor needs. Then the door that matters is unaffected by batteries, outages and app subscriptions, and the doors people cycle through are easy to manage.

Where genuine security is the goal rather than convenience, the money is better spent on the frame, an anti-snap cylinder and a hookbolt on the slider — which is what the high security locks page covers, and it costs less than most smart locks do.

The cost nobody quotes

The purchase price is the smallest part. Batteries are an ongoing cost and an ongoing chore. A subscription, where one exists, is a recurring cost for a door you already own.

Then there is the replacement horizon. A mechanical cylinder fitted properly lasts fifteen or twenty years. Consumer electronics on a door facing Highveld sun and dust do not, and a discontinued model with an unsupported app is a very expensive mechanical lock.

None of that makes a smart lock the wrong choice. It makes it a choice with a running cost, which should be compared against what the same money does when spent once on a frame, an anti-snap cylinder and a hookbolt on the slider.

Questions to ask an installer

Where does the mechanical override key live, and is it outside the door it opens? Which way does this door fail during load shedding? Is the lock underneath the electronics a proper one, or whatever was already on the door?

Who administers credentials, and what happens if that person is unavailable? What is the plan if the manufacturer discontinues the product? And in a complex: has the body corporate approved this, in writing?

An installer who has answers to all six has thought about the installation rather than the sale. One who has answers to none is fitting a product, which is a different job from solving your access problem. If you are shut out while reading this, it is a house lockout and it is worth phoning rather than reading.

Who should not buy one

Three households, and it is worth saying plainly because the marketing does not.

Anyone whose door has a worn mechanism, because the motor will drive it into failure faster than a hand does. Anyone in a complex who has not asked the body corporate, because a lock that has to come off again in March is an expensive lesson. And anyone who wants better security rather than better access management, because the same money spent on the frame, an anti-snap cylinder and the patio slider does considerably more.

The fourth is anybody who will not decide who administers it. A smart lock with three people able to issue codes and no record of who issued what is a worse arrangement than a key register, and it is the failure mode nobody anticipates.

What to do with the one you already have

If a smart lock is already fitted, three checks make it considerably more dependable and none of them costs anything.

Find the mechanical override key and put it somewhere that is not inside the house it opens — with a neighbour, in a properly fixed key safe outside, or with a family member nearby. Test it, because an override nobody has used is an assumption.

Replace the batteries on a schedule rather than on a warning, and keep a spare set outside the door. And have the mechanical lock underneath serviced like any other lock, because it is the part that still works when everything else has stopped — ordinary lock repair rather than an electronics job.