The app is only available for older phones 
Play feature? Lidraughts won’t add American Checkers and the US Checkers Federation is taking over a decade to make a playing site.
Sorry, no plans for a new app. I no longer have the time to develop this site, as fun as it was.
I keep asking lidraughts to add English American Draughts but nothing
That would be fun. Alas, open-source game developers are a small community. And English checkers is a small community. And so, of course the intersection of those groups is pretty much empty. Hopefully someday.