Baker's Game Solitaire
Bakers game is exactly like the popular FreeCell solitaire game, but instead of building the tableau in alternate color suit, you build in matching suit. This makes it more challenging.
All four variations are free to play. No in-app purchases.
If the classic four cell version is not challenging enough, you can try a 3-Cell, 2-Cell or even a notoriously difficult 1-Cell version.