Clean Flag

How well do you know the world?

Clean Flag is a beautiful, fast-paced geography quiz app that tests your knowledge of flags, countries, and capitals across the globe.

GAME MODES

Flags & Countries • Guess the Country — See a flag, name the country • Guess the Flag — See a country name, pick the correct flag • By Region — Focus on any continent or region

Capitals • Guess the Capital — See a flag, name its capital city • Flag from Capital — See a capital city, pick the correct flag

Explore & Discover • World Ranker — Match 8 countries to the stat they rank highest in (GDP, CO₂, Life Expectancy, HDI, and more) • Country Compare — Wordle-style: guess a hidden country by comparing real-world data • Hidden Flag — Colors are hidden. Type countries to reveal them one by one • Country Outline — Identify countries by their shape alone

FEATURES • 195 countries with real flag images • Play by continent or go global • Best streak tracking for every mode • 4 languages: English, Deutsch, Français, Español • iCloud-backed progress

CLEAN FLAG PRO Unlock all Capitals modes with a one-time purchase. Restores for free on all your devices.

Data sources: Our World in Data