A litter mat's job is to catch grains carried out between the toes. It suits clumping clay and tofu litter, costs little and can be placed flexibly.

A sifting box separates urine from solids with an upper and lower tray, often paired with pine or zeolite litter. It reduces scooping of wet clumps but is picky about litter type.

If the complaint is litter everywhere on the floor, start with a mat and adjust the exit direction. If it is urine smell and constant scooping, consider a sifting structure.

The two can be combined, but a sifting box still needs frequent cleaning. Check how easy it is to disassemble and whether parts are easy to reorder.