Situations
A lease removes most of this catalog. What remains is genuinely useful: a clamped window bar, a peephole camera in the existing hole, a shelf camera, a door alarm and a retrofit smart lock. All five come away on the last day and leave the property as it was.
Renting removes the wall, the door and the frame from what you may change. What is left is more than it looks.
A telescopic bar clamped into the reveal transfers force into the masonry rather than into a frame, needs no fixings, and is deliberately visible from outside — which is where deterrence works.
A peephole camera uses the hole that is already there. A retrofit smart lock turns the existing thumbturn. Neither alters anything permanently, and both come away on the last day.
A camera on a shelf and a contact alarm on a door that should stay shut. No fixings, no permission needed, no making good.
What your state’s law and your lease say about filming a shared corridor. An apartment door faces a space other households use, and the rules are not the same as for a backyard.
The frame and the cylinder. Those are the landlord’s, and a polite request is the only route.
The one thing you control, and where most of a tenant's security budget should go.
Where lockable handles may already exist and simply be unused, or where the landlord should fit them.
Where door wedges, portable alarms and travel locks provide reassurance without any fixing.
Where a small safe, if allowed, or simply not keeping cash at home, does more than any device.
| Your concern | The measure | The check |
|---|---|---|
| Old keys in circulation | A cylinder change | Landlord permission |
| No drilling allowed | Portable alarms and wedges | Nothing to fix |
| Windows | Lockable handles | Often the landlord's job |
| Moving soon | Anything portable | It comes with you |
Rented apartments accumulate small faults nobody reports: a window lock that no longer turns, a door that has dropped, a latch that does not fully engage. Each is minor, each is the landlord's responsibility, and each quietly removes a layer of security.
Landlord-tenant law and fire safety both apply.
Telescopic security bar · 101–175 cm (39.8 to 68.9 in) · orange, visible from outside · rubberized pads · no drilling
A telescopic bar clamped into the window reveal rather than screwed to the frame — vertically, horizontally or diagonally. SCHMIDT states 101 to 175 cm (39.8 to 68.9 in) of adjustment, rubberized pressure pads, and a deliberately visible orange finish.
Best for: A rented apartment, a vacation rental, or any window where nothing may be drilled.
Fits 12–14 mm (0.47 to 0.55 in) peephole, 54–75 mm (2.13 to 2.95 in) door · knock detection · no drilling · Ring app
A peephole camera for tenants: it replaces an existing peephole in a door of 54 to 75 mm (2.13 to 2.95 in) with no drilling and no cabling, and adds motion alerts and knock detection to the Ring app.
Best for: A rented apartment where drilling the door frame is not permitted and a doorbell cannot be fitted.
2K · 355° pan, 60° tilt · 6 IR LEDs · privacy shutter · 2.4/5 GHz
The cheapest camera in this hub with a physical privacy shutter. GNCC states 2K resolution, a 355° sweep, six infrared LEDs and both motion and sound detection, with recording to card or to an optional cloud plan.
Best for: A first indoor camera, or a second one for a room where the cost of losing it matters more than the picture.
≈ $10
Standalone magnetic contact · remote control · up to 8 remotes per sensor · chime or alarm
A standalone magnetic door and window alarm with a remote control, which HENDUN states can be paired with up to eight remotes per sensor, and used as a chime as well as an alarm.
Best for: A single door — a shed, a gate, an internal door — that should announce itself with no system behind it.
≈ $10
Retrofit · fingerprint, app and Bluetooth · magnetic auto-lock · 6 cells · no drilling
A retrofit lock that mounts over an existing cylinder with no drilling and no cylinder change. Signstek states fingerprint, app and Bluetooth access, magnetic auto-locking, and six batteries; the existing key still works from outside.
Best for: A first smart lock, and particularly a rented apartment where nothing may be altered.
A retrofit one, usually — it mounts over the existing thumbturn, changes no cylinder and drills nothing. Ask anyway: the lease is the authority. And be clear that it changes convenience and control, not how hard the door is to force.
It clamps into the reveal rather than screwing to the frame, so nothing is drilled. It depends entirely on the reveal being solid masonry — press it hard with a thumb before relying on it, because a dry-lined return will not hold.
Usually with permission, and a cylinder change is reversible. It is also the only way to address keys previous occupants may still hold.
More than most tenants expect: portable alarms, door wedges, adhesive-mounted cameras and lockable window handles the landlord may already provide.
Generally the landlord, and it is worth asking in writing if accessible windows have none.
Non-permanent mounts covering your own door are usually fine. Anything covering shared areas needs checking with the building first.
A cylinder change if old keys may exist, then your own door and windows. Communal security is not yours to fix.
Portable measures only. Anything fixed is money spent on someone else's property.
Designed for: A rented apartment, a vacation rental, or any window where nothing may be drilled.
Its main asset: No drilling at all — it clamps into the reveal
Its main gap: A clamped bar depends entirely on the reveal being sound
Designed for: A rented apartment where drilling the door frame is not permitted and a doorbell cannot be fitted.
Its main asset: Fits an existing peephole — no drilling, no cable, nothing to make good on leaving
Its main gap: Strict fit: 12–14 mm (0.47 to 0.55 in) peephole bore, 54–75 mm (2.13 to 2.95 in) door thickness
Designed for: A first indoor camera, or a second one for a room where the cost of losing it matters more than the picture.
Its main asset: Physical privacy shutter that closes over the lens, at the lowest price here
Its main gap: Little firmware history and no track record on long-term app support
Designed for: A single door — a shed, a gate, an internal door — that should announce itself with no system behind it.
Its main asset: Completely standalone: no hub, no app, no account
Its main gap: No notifications and no log
Designed for: A first smart lock, and particularly a rented apartment where nothing may be altered.
Its main asset: Retrofit: no drilling, no cylinder change, and the door goes back as it was
Its main gap: Six cells to keep track of, and no published runtime assumption
$5 – $56
11 models
$56 – $79
11 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.
