Atlas is a free flashcard drill for learning every country's flag by sight. It's built for people studying for geography exams, trivia nights, travel planning, or anyone who wants to stop mixing up Chad and Romania.
Pick a region, a round length, and whether you want the full set or just the flags you've struggled with — then swipe through a shuffled deck. There's no account, no sign-up, and nothing to install.
Atlas remembers, on this device only, which flags you consistently get right or wrong. That builds a running "mastery" list — so you can start a round with just the flags you're weak on instead of drilling all 195 every time. This progress is stored locally in your browser and is never sent to a server; you can clear it anytime from the mastery view.
Active recall — trying to remember something before you're shown the answer — is one of the more effective ways to commit visual information to memory, which is why Atlas is built as a swipe-through deck rather than a static reference chart.