I can't imagine an indoor compost. The process if the rotting and breaking down of the organic material, and it is gonna stink.
This is one the City of Oklahoma City sold at a big event, we just showed up and got it for cheap. It is a barrel that rotates on a central rod. That makes it easy to spin it upside down and stir the contents. It stinks like a compost. We then dump it on the ground in a pile and mix in leaves for my wife's flower gardens.
This is a small compost. Maybe I am just dead wrong, but any indoor compost is going to reek. And to compost something on a countertop just makes me really skeptical that it will be of any use beside making stinky rotted stuff.
Please let us know how it works out.