There are three basic categories for meditation stools including the standard, folding, and toadstool.
The standard comes with a platform and two supporting legs. It's the basic type, and it's straightforward to use.
The folding meditation stool is similar to the standard except the legs can collapse. This allows the meditation stool to have a thinner profile when folded, making it easier to store and more portable. It's an excellent choice if you are fond of going to a different place to meditate.
The toadstool has a different look as it comes with a platform and only one supporting leg. It's an excellent choice if your preferred meditation position is kneeling.