Duolingo
Software
Learning French while traveling in France
"I was trying to learn French on Duolingo and he kept being annoyed when the bell went off when I got something correct."
More source quotes
Playing chess while walking on a treadmill to make cardio sessions engaging; learning chess
"I play Duolingo chess, because they have chess on there now for Duolingo. They teach you chess. It's amazing. You can play friends and live people and all that stuff. They do game replays and they teach. I'm learning a ton. 30, 40 minutes go by and you're d..."