Master Every
Flag & Map
Study flags, countries, capitals, currencies, and languages with smart drills, spaced repetition, and head-to-head challenges.
Pick your challenge
Ten categories. Multiple choice or hard-mode type-in. Track your progress and master weak spots.
All 254 sovereign and territorial flags. The classic.
Click and label countries on an interactive D3 globe.
Identify all 50 states by location on an interactive map.
All 50 redesigned US state flags — newly standardized.
Name each state capital from the highlighted state.
Identify provinces and territories on an interactive Canada map.
Match every country to its capital city.
Know which currency belongs to which country.
Official and widely-spoken languages by country.
SM-2 spaced repetition — drill your personal problem areas.
Spaced Repetition
SM-2 algorithm surfaces your weakest flags exactly when you need to review them.
Head-to-Head Challenges
Race a friend in real time or send an async challenge link and compare scores.
Leaderboard
Compete worldwide or filter by category. Your rank updates after every session.