Radius combines geography trivia with judging your own confidence. A broad circle can rescue an uncertain answer; a precise circle rewards a familiar city. Cities have area, so the game scores against verified boundaries instead of a single centre point. The map shows coastlines and country borders, with city labels hidden until the reveal.

When does the daily Radius puzzle change?

A new five-city puzzle opens at midnight Eastern time. Everyone gets the same cities in the same order, wherever they live. Your first completed daily is saved in this browser.

Does touching the city limits count?

Yes. Any overlap between your circle and the outlined city area earns the full points for your chosen radius, including touching the boundary. You do not need to hit the city centre. The reveal names the boundary used; some cities use a municipality or a defined group of city districts.

Can I keep playing after the daily?

Yes. Yesterday’s puzzle is free in the archive; Premium unlocks older days. Every puzzle in the archive belongs to a specific date. Archive results stay separate from today’s daily score.

Can friends play the same puzzle?

Yes. Share your result to send your score and five outcome circles without revealing the cities. The link keeps the puzzle’s date so your friends get the same five cities.

Is Radius free, and does it work on a phone?

Today’s and yesterday’s Radius puzzles are free in your browser, with no account required. Older daily puzzles require Premium. Tap to place a circle, drag to move it, and pinch to zoom. On a computer, scroll or use a trackpad to zoom.