325 BC

Travel through the ideas that changed the world, one puzzle at a time. 325 BC is a thinking game that takes you from ancient measurement to quantum computing. Each epoch is a set of short puzzles in geometry, algebra, physics and computing. Solve them to move on to the next epoch. EVERY EPOCH IS FREE Play the whole journey, all 16 epochs, without paying. Every puzzle has a written hint and a worked solution. DISCOVER HOW IT HAPPENED Finish an epoch to unlock the story of how its ideas were found: Euclid’s Elements, Newton’s Principia, the Wright brothers’ wind tunnel and more. Collect them all on the Discoveries timeline. SEE WHERE YOU STAND See how many players have reached each epoch and how many you’re ahead of. Race everyone on the optional Daily challenge and climb the leaderboard. EARN REWARDS Unlock an illustrated reward for every epoch, plus personal medals for streaks, personal bests and persistence. LEARN FROM MISTAKES After a wrong answer, ask 325 BC to explain the likely mistake without giving away the answer. 325 BC+ Optional. Support 325 BC and get 50 fresh explanations a day instead of 10, four extra app icons and Plus avatar pieces. Choose monthly, yearly or a one-time Lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel them in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://amemobile.ca/privacy/#bc325