Getting started
Most people start with a camera, and it is the last of the four worth buying. The order that actually helps: make the door harder to force, be able to open it a crack to a stranger, know when something opens, and only then record what happens. Where parcels are left at the door, a lockable box comes before all of it.
There is a natural order to securing a house, and almost nobody follows it.
Where parcels are left at the door, a lockable box on the step ends it: it is one of the few risks a single object removes. This catalog does not carry one, and in a building where a doorman or mailroom takes deliveries the step does not apply.
Not with a new lock — with the cylinder, which is what gets attacked, and with screws long enough to go through the jamb into the framing. A strike plate held by two 25 mm (0.98 in) screws is what actually fails, and 80 mm (3.15 in) screws cost nothing. A door chain comes next, to open the door to a stranger without opening it wide: it is not a security device, and it gives to a shoulder.
A contact sensor reports the moment a door or window starts to move, which is earlier and less ambiguous than a camera noticing somebody already inside. The SONE Smart One does it over direct Wi-Fi, with no hub to buy separately.
Now it is worth having, because everything it records is already less likely to happen. Start outdoors, at the approach people actually use.
That the previous one is done. A camera on a door with a builder’s cylinder records the door being opened.
Where lighting, visible cameras and good locks do most of the work, because most opportunists move on to an easier target.
Where sensors and alarms tell you something is happening, which is a different job from preventing it.
Where cameras earn their place, provided the footage is actually usable and actually kept.
Where the honest answer is that a system you understand and use beats a better one you ignore.
| Your goal | The first purchase | Why |
|---|---|---|
| Prevent entry | Better locks and lighting | It stops rather than records |
| Know what happened | A camera | Evidence, not prevention |
| Be alerted | An alarm with sensors | Noise and response |
| Rented home | Non-permanent devices | Everything must come off |
Security equipment fails quietly, which is the worst way for it to fail. Batteries go dead, lenses fog, apps lose their connection and nobody notices until the day it mattered.
Security equipment carries obligations as well as benefits.
30/30 mm (1.18 in) · anti-pick pins · emergency function · 5 reversible keys · code card
ABUS's everyday euro cylinder: special pins for pick and manipulation resistance, an emergency function that works with a key in the other side, and five reversible keys with a code card for reordering.
Best for: Replacing a builder's cylinder on a front door, at the smallest sensible price.
≈ $54
Stainless door chain · 200 mm (7.87 in) chain · spring button · fits timber and metal · inside only
A stainless steel door chain with a reinforced link and a spring button, operated only from inside. SAYAYO states 200 mm (7.87 in) of chain, a 123 mm (4.84 in) main plate, and a complete screw set.
Best for: Opening a door to an unknown caller without opening it fully — and nothing more than that.
Wi-Fi 2.4 GHz direct, no bridge · Tuya · 70 × 25 mm (2.76 × 0.98 in) and 11 × 44 mm (0.43 × 1.73 in) · 2 × AAA · adhesive
A Wi-Fi door sensor that connects straight to the router with no bridge or hub, on the Tuya platform. Sone publishes both module sizes and states adhesive mounting on two AAA cells.
Best for: One or two doors, in a house with no hub and no intention of getting one.
1080p · 360° pan, 130° tilt · 30 m (98 ft) IR · microSD to 512 GB · IP65
An entry-level pan-and-tilt outdoor camera that records to its own card. TP-Link states 1080p, a 360° horizontal sweep and night vision to 30 m (98 ft), and the listing is unusually frank about what the model is not.
Best for: A first outdoor camera on a wall that already has a socket nearby, where 1080p is enough and the card matters more than the picture.
≈ $78
Because a camera records what has already happened. A better cylinder, a parcel box and longer screws in a strike plate change whether it happens. Buy the things that prevent before the things that document — and then buy the camera, because knowing is worth something too.
Under a hundred dollars for a cylinder, a camera and a sensor, plus a box of long screws that costs almost nothing and does more than any of them. The expensive parts of home security are rarely the effective ones.
Better locks and lighting. They prevent entry, while cameras record it. Physical security is the layer everything else depends on.
A visible camera deters some people, particularly opportunists. It does not physically prevent entry, and treating it as prevention is a common mistake.
Some devices lose most of their usefulness without one. Check what a device does with no plan before buying it, not after.
Cameras that see beyond your own property raise real legal obligations in many countries. It is worth checking what applies where you live.
On a schedule you actually keep. Security equipment fails silently, and the day you discover it is usually the worst possible day.
Choose devices that fit without drilling and come off cleanly. Plenty of useful equipment works that way, and the lease decides the rest.
Designed for: Replacing a builder's cylinder on a front door, at the smallest sensible price.
Its main asset: Emergency function: it operates from outside with a key left in the inside
Its main gap: 30/30 is a short cylinder — it fits a thin door and not a thick one
Designed for: Opening a door to an unknown caller without opening it fully — and nothing more than that.
Its main asset: Stainless steel, so it does not rust in a damp hallway
Its main gap: A chain is a talking device, not a security device — it yields to a shoulder
Designed for: One or two doors, in a house with no hub and no intention of getting one.
Its main asset: No hub or bridge — it joins the router directly
Its main gap: Wi-Fi sensors have far shorter battery life than Zigbee ones
Designed for: A first outdoor camera on a wall that already has a socket nearby, where 1080p is enough and the card matters more than the picture.
Its main asset: Records to a microSD card up to 512 GB with no subscription required, per TP-Link
Its main gap: 1080p only: TP-Link itself points buyers at the C510W or C520WS for 2K
$10
6 models
$17 – $34
7 models
$54 – $115
6 models
Accessories and spares from the same aisle, at the price we read. Confirm they suit the device you choose before ordering: it turns on the model and the part number, which the listing gives.
Device against device, already covered, inside this guide or this aisle.
The devices listed are drawn from the catalog of this site. Specifications are those the maker and the Amazon listing publish; prices are what Keepa recorded on the date shown, and both move. The order follows declared specifications, the balance between stated strengths and stated limits, and price. No device here has been installed or tested by us, and no page claims it was.
Last checked on
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
Cameras, alarm kits and safes swing by thirty dollars or more across the year, and the biggest "discounts" often land at prices the same model sold for six weeks earlier. UniverTrack tracks the real price history across retailers, spots fake reductions, and alerts you when it is genuinely the moment to buy.
