Most practice sites hand you thousands of problems, which is exactly why people stop after a week. Daily Coding gives everyone the same single challenge each day, borrowed from Advent of Code but running all year. You solve it in a built-in editor and run real tests in a sandbox, in 11 languages. Reading the task and running the tests needs no account. Submitting adds streaks, points, levels, achievements and leaderboards, plus access to everyone else's solutions once you post your own.