pi! vs Recall IQ

How many digits of π can you memorize? π Memorizer helps you learn and recall the digits of pi using a simple, focused approach: see the digits, hide them, type them back. No gimmicks — just effective memorization. LEARN • Study digits in customizable chunks of 5, 10, or 20 • See the digits, then hide and input them from memory • Pick up right where you left off — progress saves automatically • Browse all 10,000 digits with your learned positions highlighted • Tap any group to jump to that position and start practicing TEST • Type digits of π from memory as fast as you can • Timer starts on your first tap — no pressure until you're ready • See your entered digits organized in clean, readable groups • Wrong digit? Game over. See exactly where you went wrong and what the correct digit was • Beat your personal record and track your improvement STATS • Personal best record, learning progress, current streak • Average speed (digits per second), total sessions, and practice time • Full session history to review past attempts APPLE WATCH • Quick-test on the go with a compact numpad • Best record syncs with your iPhone via WatchConnectivity DESIGNED FOR APPLE • Liquid Glass design language — beautiful on iOS 26, iPadOS, and macOS • Apple Pencil Scribble support on iPad — write digits by hand • iCloud sync keeps your progress across all your devices • Haptic feedback on every tap for a satisfying input experience Whether you're a math enthusiast, a memory athlete, or just curious how far you can go — π Memorizer is your companion for the journey from 3.14 to 3.14159265358979323846…

Recall IQ is a clean, focused memory trainer that tests how many digits you can recall under pressure. Numbers flash on screen, then vanish. Your job: type them back from memory. Each level pushes further more digits, more numbers, or trickier formats until your recall breaks. SIX MODES Normal modes • Single: one number appears, then you type it back. • Double: two numbers appear one after the other, then you type both together. • Chain: three short numbers appear in sequence, then you rebuild the full chain. • Multi: a configurable series of numbers appear in sequence (2–8 segments), then you type them all back in order. Special modes • Phone: memorize a full phone number (e.g. 06 78 28 39 30) and type it back. • Plate: memorize a registration plate (e.g. ER 450 AZ) letters and digits and type it back. THREE DIFFICULTIES • Easy: longer reveal times, 4 lives, and shorter starting numbers. • Normal: balanced settings with 3 lives. • Hard: shorter reveals, 2 lives, and longer starting numbers. You can also fine-tune the reveal duration with a manual time adjustment. TRACK YOUR PROGRESS A built-in dashboard shows your best scores, longest digit spans, average performance, and a session-by-session chart so you can watch your working memory improve over time. Filter between Normal and Special modes to focus on what matters to you. DESIGNED TO RESPECT YOUR TIME • No sign-up required. Just open and play. • All progress is stored locally on your device. • No social features, no leaderboards, no distractions. • A single, non-intrusive banner ad keeps the app free hidden during gameplay. Recall IQ is available in English, French, and Spanish, with automatic language detection. Whether you are a student training for mental math, a professional sharpening focus, or just someone who likes a clean brain workout Recall IQ is your daily digit gym.