3 ms·

Great, thanks for the suggestion. Apparently, Lichess has 'Over the board' feature that allows you to play with your friend offline, nice!

• naet 3y ago
  It also has a pretty good chess clock if you have a physical board but want to play timed.
• mat_epice 3y ago
  It also lets you play an engine (stockfish) running on your phone. I play offline on planes all the time.