All your board games, on your phone. The Android app is on Google Play; the iPhone version is on the way.
Get it on Google Play
The iPhone app is not ready yet. Until it is, you can put Playgridia on your home screen from Safari with “Add to Home Screen” — the steps below show how.
If you would rather not download anything, your browser can add Playgridia to your home screen itself. Not quite the app, but you get the icon and it opens full screen.