If you’re into FreeCell, check out my ranked list of sites based on things like...

https://wiki-coast.win/index.php/FreeCell_Site_for_Hardcore_Difficulty_-_Where_Do_I_Go_After_Classic%3F

If you’re into FreeCell, check out my ranked list of sites based on things like ad load and whether they offer unlimited undo. I liked Solitaired for its clean interface and no sign-up hassle