Every cat.
Their own house rules.
Recognises your cats as they come and go, with access and curfews for each personality.
Unlimited cats · Microchip reading in both directionsDimensions & specs
Fits your home.
Knows your cats.
Thoughtful details. Everyday peace of mind. Get to know the door that gives your cats their freedom, and you one less thing to worry about.
Find your fitEvery cat.
Day or night.
A watchful welcome.
Checks for prey before letting your cat in, with infrared night vision for after-dark arrivals.
Prey detection · HD video · Infrared illuminationPlug in.
Leave batteries behind.
A permanent power connection means no batteries to replace. Just find a socket and plan the cable route.
USB-C mains power · 3 m cable and adaptor includedA place in your home
A familiar fit.
A smarter welcome.
In a door, a wall or glass. OnlyCat replaces many existing cat flaps, with adaptors and tunnel extensions for different homes.
Three measurements. Three different jobs.
The front frame sits against your door. The passage is for your cat. The tunnel passes through the opening.
Overall front
210 × 210 mm
Width × heightThe frame you see against your door.
Your cat’s passage
142 × 120 mm
Width × heightThe opening your cat steps through.
External tunnel
165 × 172 mm
Width × heightThe tunnel that passes through the door or wall.
Glass or a deeper wall?
The standard glass mounting adaptor suits a circular cutout of 212–260 mm. Tunnel extensions accommodate deeper walls. Confirm your opening and accessories before cutting or ordering glass.
Room for your cat.
Designed for cats up to 6 kg (13 lb). If your cat already uses a flap, compare its opening with the measurements here.
Customers typically report no issues with cats around 8 kg, but suitability at that size cannot be guaranteed.
Ask us about the fit
Measure once. Fit with confidence.
Open cutout template
Use the printable template to check your opening. Print on A4 at 100% scale.
The finer details
Everything, at a glance.
For the tape measure. For the installer. For the curious.
Size & fitting
- Overall front dimensions
- 210 × 210 mm (W × H)
- Flap opening
- 142 × 120 mm (W × H)
- Rectangular cutout
- 165 × 172 mm (W × H)
- Circular glass cutout
- 212–260 mm with the standard mounting adaptor
- Installation
- Doors, walls and glass; mounting accessories vary by installation
Power & connection
- Power supply
- Mains powered via USB-C
- Included cable
- 3 m, with power adaptor
- Longer reach
- Longer cables and extensions available to order
- Power consumption
- 1 W idle · 5 W peak
- Wi-Fi
- 2.4 GHz b/g/n
Recognition & protection
- Cats
- Unlimited, with individual profiles and access rules
- Cat size
- Designed for cats up to 6 kg (13 lb)
- Recognition
- Reads supported microchips and collar tags on entry and exit
- FDX-B
- The most commonly implanted microchips
- EM4100
- Collar tags, including those available in our store
- FDX-A
- Legacy microchips, mainly used in the US
- Camera
- HD video with infrared night vision
- Prey detection
- On-device processing with a dedicated neural network accelerator
Everyday controls
- House rules
- Individual entry, exit and scheduled curfew policies
- App
- iPhone, Android and web
- Activity
- Video events, notifications and cat activity history
- On the flap
- 2.9-inch ePaper display, configurable lighting and speaker alerts
- Smart home
- Home Assistant integration
Freedom for them. Calm for you.
A calmer home
starts at the door.
Choose your OnlyCat, with the mounting accessories and cable options for your home.
Shop OnlyCat Explore options in the store.