Kastrul is a spellchecker. It is not connected to a word processor, and there is no functionality for suggestions, etc. The tool is intended for people that know how to spell correctly, but slips at the keyboard every once in a while. The good thing about Kastrul is that you don't have to click your way through five thousand correctly spelled words, and that you don't get those red underlinings for words that your word processor thinks are wrong (science has proved that professional writers very seldom actually make spelling mistakes - a spellchecker should trust its user more than dictionaries and algorithms). The list of words not in the dictionary is presented in a monospaced font - handy for ocular inspection of large amounts of text.