It actually works!
I know that for most people it crashes, but besides the fact that it has trouble finding opponents (it may just be the fact that nobody plays because it always crashes for them), it works very well for me.
If I had one suggestion, it would be that it makes me jump whenever there is an opportunity to jump. Other than that, it is a very good checkers app.
Cami.Clark about
Checkers: FS5, v3.1.0