Achievements

Get your first correct answer in Play mode.

Get 10 correct answers in Play mode.

Get 100 correct answers in Play mode.

Get 1,000 correct answers in Play mode.

Answer correctly in under 3 seconds.

Get 5 correct answers in a row, each under 6 seconds.

Correctly solve a date from before the year 1800.

Correctly solve a February 29th — a leap day.

Correctly solve a date rated Hard — a leap-year January or February, or a date weeks from its doomsday.

Reach the highest rank, Living Calculator, by earning 60,000 XP.

Complete your first practice mini-game.

Complete all three Foundations games: Weekday Number, Leap Years and Anchor Day.

Earn 3 stars on any mini-game by scoring over 10,000.

Complete any mini-game at level 5, its hardest difficulty.

Earn 3 stars on all 5 levels of a single mini-game.

Complete all 12 practice mini-games.

Earn 3 stars on all 5 levels of every mini-game.

Finish a run of either odd + 11 drill.

Complete the year math both ways — the divide-by-12 drills and the odd + 11 drills.

Complete your first daily challenge.

Get all 5 rounds correct in a single daily challenge.

Reach a 7-day daily challenge streak.

Reach a 30-day daily challenge streak.

Reach a 100-day daily challenge streak.

Get 10 correct answers from memory in a single Flash session.

Get 25 correct answers in a single Zen session.

Answer a date correctly using only your voice.

Correctly solve a date you only heard, in Listen mode.

Win your first Arena Battle.

Fight 10 Arena Battles.

Reach the Gold tier (1700+ rating) in the Arena.