New visualization: Cantor's Diagonal — tap through an animated proof that some infinities are bigger than others. Plus 2 new quiz questions (30 total), a new "Cantor, Pi, and the Bigger Infinity" section in About Pi, and a fix for sharing and copying content. Pi Day is March 14 — how many digits will you know by then? If you're new since 2.1: here's what you've got. Memory Insights Dashboard Your play sessions become accuracy heatmaps, weak-spot analysis, and a memorized frontier tracker. See exactly where you're strong and where to focus next. Pro unlocks transition analysis, chunking detection, trend graphs, and the full interactive heatmap. Pi Reader Coaching Have a friend, teacher, or family member read digits aloud while you type them back. Earn 6 dedicated badges from your first 5 digits all the way to Pi Reader Expert. 11 Interactive Visualizations From a rolling circle that reveals pi to Monte Carlo estimation, Buffon's Needle, Fourier Waves, Euler's Identity, Quantum Interference, and now Cantor's Diagonal — every visualization is hands-on and shareable. 5 Game Modes, 57 Badges, 30 Quiz Questions Pimon, Speed Pi, Pure Pi, Pi Recall, and the Quiz. Race on 8 Game Center leaderboards. Collect badges across 9 categories. Chase the Completionist.

In case you missed it: Our massive 2.1 update is here, bringing entirely new ways to train and track your progress! Memory Insights Stop guessing and start improving! Your new Memory Insights dashboard turns your play sessions into actionable heatmaps, weak-spot analysis, and a memorized frontier tracker. See exactly where you're strong and where you need a little more focus. (Pro unlocks the ultimate training toolkit: transition analysis, chunking detection, trend graphs, and the full interactive heatmap!) Pi Reader & New Awards Memorizing is better together. Have a coach, friend, or family member help you train using the Pi Reader. Plus, we've added 6 brand-new badges to earn as you practice! Track your milestones from 5 to 50 decimal places, build up your daily streaks, and chase the ultimate Pi Reader Expert badge. Even More to Explore Visualize the Math: Dive into two new interactive visualizations: Euler's Identity and Quantum Interference. Race the Clock: Climb the Game Center leaderboards with two new Speed Pi distances (8 and 20 decimals). Track Everything: Full Session History is now available across every single game mode. What’s new in 2.1.1: We’re always polishing the experience. In this quick update: Seamless Links: Fixed a hiccup with app links so they instantly take you exactly where you need to go. Smoother Navigation: Speed Pi races now support standard swipe-back gestures, making getting in and out of races feel completely natural. Track Your Progress: We’ve renamed the Awards tab to "Progress"—the perfect home for your stats, badges, and Game Center ranks. Pi Reader Polish: The session timer now pauses perfectly on the end-of-session dialog and resets cleanly for your next run. UI Tweaks: You can now easily swipe to dismiss upgrade screens, and info buttons on your visualization cards are much easier to spot.

Memory Insights!  Understand how well you know pi and how to improve. Pi Reader! Help your coach, friend or family member help you. Memory Insights See exactly where you're strong and where to improve. Your new Memory Insights dashboard turns your play sessions into accuracy heatmaps, weak spot analysis, and a memorized frontier tracker. Free players get core insights. Pro unlocks transition analysis, chunking detection, trend graphs, and the full heatmap. Pi Reader Awards Earn 6 new badges as you practice with your Pi Reader coach, friend or family member. Track milestones from 5 to 50 decimal places, build day streaks, and work toward a new Pi Reader Expert badge. Also new: - Two interactive visualizations: Euler's Identity and Quantum Interference - Two Speed Pi distances (8 and 20 decimals) with Game Center leaderboards - Session history across every game mode - Bug fixes and performance improvements

Pimon is back, completely rebuilt for modern iOS. Everything is new: Fresh interface designed for today's devices 8 interactive visualizations that bring pi to life 28-question quiz spanning Easy to Expert Dozens of badges to earn across 9 categories 7 Game Center leaderboards to compete globally Speed Pi: race to 31, 50, or 100 decimals — or go Endless Pi Recall: digits flash then vanish — enter them from memory Consecutive-day streak badges across all game modes Shareable cards for scores, badges, stats, and visualizations Speed Pi tab with Pure Pi typing mode and a scrollable pi reference 4 speed modes from Slow to Expert DTMF touch tones that sound satisfying every time Full 1,000,000-digit pi reference Welcome back, pi fans.