The largest drum here at a stated 95 litres, with a wide entry, an 8-litre sealed waste bin quoted at 10 to 15 days, and a cleaning cycle that starts two minutes after the cat leaves.
The bottom line The most capacity per euro on this page, with a litter list wide enough for most households. Buy it if you have the floor space, and check the US availability before ordering from outside Europe.
What it is
A large rotating globe — 95 litres by Redkey’s figure — with a wide entrance
and an 8-litre sealed waste bin underneath. The cycle starts automatically
within two minutes of the cat leaving, and the app runs over 2.4 GHz Wi-Fi.
Capacity, and what it is for
Ten to fifteen days of daily use before the bin needs attention, on Redkey’s
numbers. That is the interval that makes an automatic box worth owning: at
seven days you are still organising your week around it, and at fifteen you are
not. In a multi-cat home the figure comes down accordingly, which is where the
large drum earns its footprint.
Litter
Clumping, bentonite, mineral and plant-based. A wider list than several boxes
here charge more for, and the reason this machine suits households that have
switched to lighter litters.
Safety
Three overlapping systems, as Redkey describes them: an anti-pinch stop that
halts the mechanism on an obstruction, weight sensing that detects the cat and
suspends cleaning, and infrared monitoring of the drum in real time. The
two-minute delay sits on top of that, and it is the layer that covers the cat
that changes its mind at the doorway.
Noise
Under 35 dB, which Redkey attributes to a silicone roller system. As with
every figure of this kind on this page, it is a manufacturer measurement taken
their own way — comparable in spirit, not in method.
Availability
Listed in Germany, the UK, France, Italy and Spain; absent from Amazon US when
we checked.
What we like, and what we don't
Strengths
The largest stated drum volume on this page, with a wide entry to match
Accepts plant-based litter as well as clay — a wider list than several dearer boxes
Sealed waste bin quoted at 10 to 15 days for one cat
Under 35 dB, with a silicone roller system Redkey credits for it
Compromises
Not listed on Amazon US when we checked
A 95 L globe is a large object — measure before ordering
The 1 kg lower limit is a sensing threshold, not a recommendation for kittens
Specifications
Drum capacity
95 L, with a wide entry
Cat weight
1–8 kg (Redkey figure)
Litter
Clumping, bentonite, mineral and plant-based
Cycle
Starts automatically within 2 minutes of the cat leaving
Redkey lists clumping, bentonite, mineral and plant-based litters. That puts it among the more permissive boxes here — the PetPivot excludes plant litters entirely, and the PetSafe Ultra takes crystal only. If you have moved to a lighter plant litter for the weight of the bags, this is one of the boxes that follows you.
What is the two-minute delay for?
It is the pause between the cat leaving and the drum turning. A delay long enough to cover a cat that steps out and immediately steps back in is a safety feature, not a convenience one — and it is why boxes with an adjustable delay are worth more than the specification sheet suggests.
How big is it, really?
Redkey quotes a 95-litre globe, the largest number on this page. Treat that as a warning as much as a feature: it is a piece of furniture, and the place you plan to put it should be measured rather than estimated.
App · ~35 dB · 9 L litter · all litters except crystal
A mid-priced drum box with an ozone-ion deodorising system and the Smart Life app. It holds up to 9 litres of litter, runs at about 35 dB, and takes everything except crystal.
Best for: A European household that wants a full-featured drum box at the lower end of the price range and already has other Smart Life devices.
An open-topped drum box for cats that refuse enclosed machines, with the widest stated weight range here — up to 15 kg — and 6 infrared plus 4 weight sensors watching the cycle.
Best for: A large cat, or a nervous one that will not enter an enclosed machine — and a household that can put the box somewhere the litter scatter does not matter.
The best-documented box on this page: PETKIT publishes the drum volume, the internal dimensions, the entry height, the cat weight range and the age limit. It takes any clumping litter except crystal.
Best for: A multi-cat household with adult cats between 2 and 8 kg, a hard floor, and no intention of changing litter type.