This very simple app offers no solutions to crossword clues. Instead think of it as a variation on the blank square that sits alongside the daily cryptic in a newspaper, for experimenting with wordplay and suspected anagrams.
In many cases the solver knows the components for solving a clue from the wordplay but cannot visualise the answer without pen and paper. This app allows the solver to quickly display the letters from the wordplay in a way which can help to see the answer.
The app contains a more detailed help file with a written example.