TestMaker vs Infinite Digits

Over 1.9 million downloads worldwide! TestMaker is a quiz maker and flashcard app that helps you study for school tests, college entrance exams, professional certifications, and languages. WHO IT'S FOR - Students who want to build their own practice questions for upcoming tests - Anyone who wants to manage vocabulary flashcards on their phone - Busy learners who study during commutes and spare moments - Classmates and study groups who want to share question sets - Anyone who prefers a simple, distraction-free study app CREATE YOUR OWN QUIZZES Build question sets that match exactly what you need to learn: - Flashcard-style questions where you type the answer - Multiple-choice questions, including select-all-that-apply - Fill-in-the-blank questions - Questions with images and explanations Powerful tools make creating questions fast: - Create questions on your computer with the web version: https://ankimaker.com/ - Import and export CSV files - AI question generation: scan your textbook or notes and turn them into practice questions automatically STUDY EFFECTIVELY Flexible quiz options help the knowledge stick: - Retry mode that focuses on the questions you got wrong - Shuffled questions and answer choices - Self-grading mode without keyboard input - Swap terms and definitions - Read-aloud (text-to-speech) for questions - Timed answering SYNC AND SHARE Your question sets are saved in the cloud: - Sync across multiple devices - Move to a new phone without losing your data - Share question sets with friends and classmates GREAT FOR SUBJECTS LIKE - Vocabulary and languages: Spanish, French, English, Chinese, Korean, Japanese, German - Test prep: SAT, ACT, AP exams, midterms, and finals - Nursing and medical studies: NCLEX, anatomy, pharmacology - Professional certifications and license exams: accounting, IT, real estate - History, geography, biology, chemistry, math, and more PREMIUM PLAN Subscribe to Premium to unlock everything: - No ads - Unlimited questions - Video and audio attachments - Answer history saved without limits - Study progress synced across devices - Offline access - Rich text and math formulas [Terms and Conditions for Paid Plans] https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ [Terms of Use] https://ankimaker.com/terms [Privacy Policy] https://ankimaker.com/privacy

How many digits of pi can you remember—and how much do you really know about the numbers behind them? Infinite Digits turns mathematical constants into a focused, rewarding learning experience. Memorize digits at your own pace, test your recall under pressure, explore the formulas that make each constant meaningful, and watch your skills grow over time. Go beyond π Study eight essential mathematical constants: • Pi (π) • Euler’s Number (e) • The Golden Ratio (φ) • The Euler–Mascheroni Constant (γ) • Square Root of 2 (√2) • Square Root of 3 (√3) • Natural Logarithm of 2, ln(2) • Apéry’s Constant, ζ(3) BUILD A MEMORY THAT LASTS Training Mode gives you a calm, flexible place to practice. Choose a constant, set the number of digits, enter the sequence from memory, and get clear feedback on your result. Start with a short run or work toward hundreds and thousands of digits—the pace is yours. TAKE ON THE CHALLENGE Ready to find your limit? Challenge Mode offers seven levels, from a quick 9-digit warm-up to a legendary 9,999-digit test. New levels unlock as your continuous correct prefix improves, giving every session a clear goal and every personal best a reason to keep going. SEE MORE THAN A SCORE A single percentage never tells the whole story. Infinite Digits tracks both your longest correct prefix and your position-by-position accuracy, so you can see where your recall is strong and where it breaks down. Review recent sessions, compare constants, follow progress charts, and turn small improvements into lasting momentum. UNDERSTAND BEFORE YOU MEMORIZE The Formula Explorer connects digits to ideas. Interactive visuals, sliders, core formulas, and guided steps help you see how each constant appears in geometry, calculus, logarithms, sequences, and number theory. EXPLORE THE STORIES BEHIND THE SYMBOLS Open the built-in mathematical encyclopedia to discover each constant’s historical timeline, real-world and scientific applications, and surprising facts. Learn how π evolved from ancient approximations, why e appears in growth and decay, how φ connects to geometry, and why ζ(3) still fascinates mathematicians. CALCULATE WITH PRECISION Need more digits for study, reference, or curiosity? Use the Constants Calculator to generate high-precision values, adjust the number of decimal places, preview the result, and copy the full value when you need it. DESIGNED FOR FOCUSED PRACTICE • Eight constants in one beautifully organized app • Adjustable training length • Seven progressively challenging recall levels • Detailed session history and performance statistics • Longest-prefix and positional-accuracy tracking • Interactive formula visualizations • Historical timelines, applications, and facts • High-precision constants calculator • Ten distinctive light and dark color themes • Optional sound effects and haptic feedback • Practice progress saved locally on your device • Interface support for English, German, French, Spanish, Japanese, Korean, Simplified Chinese, and Traditional Chinese FOR CURIOUS MINDS AT EVERY LEVEL Infinite Digits is made for students, teachers, math enthusiasts, trivia lovers, competitive memorizers, and anyone who enjoys turning a difficult goal into a daily habit. You do not need to be a mathematician. Start with a few digits, learn the pattern, and build from there. Your next personal best begins with one more digit. Download Infinite Digits and discover how far your memory—and your curiosity—can go.