Guess the Coaster

Daily roller coaster puzzle

One mystery coaster a day.

Six guesses.
Every guess shows you seven specs.

Country, manufacturer, seating, year opened, height, speed and inversions. Green when it matches, a range when you're close. Work it out before you run out.

How a guess works

  1. Guess any coaster

    Start typing a name. Everyone gets the same mystery coaster, and you have six guesses.

  2. Read the seven specs

    Each guess comes back match or no match on every spec, with arrows for higher or lower on the numbers.

  3. Close in

    Today's card keeps what you've learned: green when a spec is confirmed, a range like "over 306 ft" while you narrow it down.

In the beta, and what's next

Play now, free

  • The daily coaster. A new one at your midnight.
  • Past puzzles. Catch up on any day you missed since you joined.
  • XP, levels and streaks. A hundred levels, from First Timer up.
  • Your ridden collection. Mark the coasters you've ridden.
  • Daily reminders. Optional, and you choose the time.
  • No account needed. Just start playing; sign in with Apple or add an email later to keep your progress on a new phone.

Coming next

  • Duels. Challenge a friend to the same mystery coaster. 60 seconds per guess, fewest guesses wins.
  • Crews. A group for your park friends, with its own leaderboard.
  • Then the App Store. The full release comes once the beta has been played and polished. Join the beta to hear first.

Play it on your iPhone

The beta is free and takes about two minutes: first Apple's TestFlight app (it's how Apple runs app betas), then Guess the Coaster.

Join the free beta

Needs an iPhone with iOS 16.4 or later. There's no Android version yet.

QR code that opens guessthecoaster.com/beta
Scan with your iPhone camera