Get CodeRiv

Free on iOS and Android. Pick your stack, play your first duel as a guest and keep your progress when you create a profile.

Download on theApp Store Get it onGoogle Play

Got a challenge link from a friend? Open it on your phone after installing.

The CodeRiv Fight screen: hearts, level and day streak, Daily Commit, Challenge a friend and Random rival.

A duel question answered correctly, with the explanation below.