π Challenge vs Cube Coach

"Pi Challenge" is a fun and engaging brain-training game designed to help you memorize Pi while improving your memory and concentration skills. Easy-to-use controls make this game accessible to everyone—just input the next digit of Pi correctly to extend your streak. Be careful—one wrong digit and it's game over! Compete against yourself and your friends, share your best scores on social media, and enjoy a quick brain exercise anytime, anywhere. Exciting updates are on the way, including a Time Attack mode, online leaderboards, and educational features to master memorizing Pi. Join the challenge today and become a Pi master!

MOST CUBE APPS JUST SOLVE THE CUBE FOR YOU. CUBE COACH 3x3 TEACHES YOU HOW TO SOLVE IT YOURSELF. Twenty-five hands-on lessons on a live 3D cube, from never-having-solved to sub-20-second CFOP. Every lesson lets you scan your real cube, then walks you through the moves on screen — one step at a time, exactly the moves you need from the exact state of your cube. THREE COURSES. TWENTY-FIVE LESSONS. • Foundations — Notation (free), the white cross (free), first layer corners (free), middle edges (premium), last layer (premium). Your first full solve. • Intuitive F2L (premium) — Pair up corners + edges and slot them together. The transition from beginner to intermediate speedcubing. • 2-Look OLL & PLL (premium) — Ten OLL algorithms + six PLL algorithms, with recognition drills under timer pressure. THE KILLER FEATURE — STATE-AWARE SOLVES In every lesson, tap "Capture your cube" to scan your physical cube with the camera, then tap "Solve {step name} from this state." Cube Coach shows you the exact moves to reach just that step's goal — not the whole solve, not the next ten steps, just what the lesson is teaching. Step through Prev / Play / Next on the 3D cube while mirroring the moves on your real cube in your hands. THIS IS HOW HUMANS LEARN. NOT HOW SOLVERS SOLVE. The mid-stage solvers don't use a black-box optimizer. They emit the named algorithms each lesson teaches — Sune, R U R' U', the A-perm — so what you watch on screen is what you'll eventually do from memory. WHAT'S INCLUDED IN THE FREE TIER • Three Foundations lessons + a cube solver • Speedcubing timer with WCA-style Ao5 / Ao12 / best-single tracking • Scrambler with full WCA random move sequences • 3D cube playground — scramble, twist by tap or drag, solve from any state • Capture your physical cube via the camera or paint it in by hand • Save and load cube snapshots so you can return to a state later WHAT'S INCLUDED IN PREMIUM ($8.99 one-time, lifetime) • All Foundations lessons • Every lesson in Intuitive F2L (10 lessons) + 2-Look OLL & PLL (7 lessons) • Ad-free everywhere ONE-TIME PURCHASE. NO SUBSCRIPTION. YOURS FOREVER. Cube Coach is built around one idea: the difference between watching a solve and actually solving the cube is muscle memory. Every interaction in the app — capture, step, play, scramble, time, drill — is designed to move algorithms from the screen into your hands. PRIVACY No accounts. No tracking across other apps. No analytics SDKs. Cube Coach stores your solves and lesson progress on-device only. The camera is used solely to read sticker colors during cube capture — frames are processed in-memory and never written to disk or transmitted off-device. Built for iPhone and iPad. Universal app. Free to download.