Yes, African dwarf frogs eat snails. In the wild, the diet of African dwarf frogs includes snails, fish, insects, worms, and larvae.
However, that doesn’t mean you can’t keep African dwarf frogs and snails in the same tank. These frogs will only eat baby snails, snail eggs, and tiny snails that can fit in their mouths. As long as the snails are big enough when introduced into the tank, the frogs will leave them alone.
In fact, due to their peaceful temperament, some snails make excellent tankmates for African dwarf frogs. These include: