If you're into FreeCell, I've tested a bunch of sites to see which ones really...

https://cruzinnp079.tearosediner.net/is-freecell-really-99-99-percent-solvable-or-is-that-a-myth

If you're into FreeCell, I've tested a bunch of sites to see which ones really work well. Some have annoying ad loads while others offer unlimited undo or smooth mobile drag-and-drop. For example, FreeCell365 nails no sign-up and unlimited undo