Rack solvers are useful but incomplete
A rack solver or anagram finder can list words from your letters. That is helpful for learning possibilities, but it does not know the current board, open squares, cross words, or premium scoring opportunities.
Board solvers use position
A board solver starts from the placed tiles and searches legal attachment points. It must fit your rack letters around existing words and reject moves that create invalid cross words.
Screenshot solvers reduce setup time
The hard part of board solving is often entering the board. TileSmith uses screenshot reading to build an editable board state first, then asks you to review the result before scoring.
Use both ideas together
Good move finding needs both rack knowledge and board knowledge. The rack tells the solver what letters are available; the board tells it where those letters can score.