Infinite Math vs Little Stoic

That “I solved it!” feeling, all over again. A math app for grown-ups who solve for pleasure—not for any exam. From the wonder of primes and divisors to the crane-and-turtle puzzle, the Monty Hall problem, and even the legendary entrance exams of Japan's top universities— a collection of beautiful problems that make you feel "numbers are fascinating." ■ Made for you if you ・love numbers and logic puzzles ・enjoy giving your mind a workout in spare moments ・want to know not just the answer, but the idea behind it ・are done with exams, but want to rediscover the joy of math ■ Six categories, 100+ problems (more added over time) ・Number Theory & Puzzles … primes, divisors, Fibonacci, perfect numbers, and more ・Classic Problems … crane-and-turtle, Monty Hall, the Königsberg bridges, Pick's theorem, and more ・Elementary Exams … ferris-wheel logic, seesaw puzzles, and other gems ・Junior-High Exams … work, travel, concentration, and counting problems ・High-School Exams … symmetric expressions, probability, Euler's prime-generating formula ・University Exams … legendary stumpers like "Is tan 1° rational?" and "Prove π > 3.05" ■ Highlights ・Sessions … test yourself with five problems at a time ・Explanations worth reading … not just the answer, but the background and the thinking ・Interactive figures … trace the Königsberg bridges or Pick's theorem with your finger ・Progress tracking … solved problems are recorded; aim to clear them all ・19 languages … enjoy these problems in Japanese, English, Chinese, Korean, and more Answers are simple multiple choice—and some figures come alive at your fingertips. Enjoy the world of numbers on your commute, on a break, or before bed.

Little Stoic brings the wisdom of the ancient Stoics to your everyday life — one story at a time. Each lesson opens with a short narrative rooted in real Stoic philosophy, followed by a quiz that helps the ideas stick. Whether you're navigating a difficult relationship, a hard day at work, or simply trying to understand your own emotions, there's a lesson for it. 16 parts. 100+ lessons. Three levels. Begin with the Introduction — discover where Stoicism came from, learn the two-basket framework for separating what's in your control from what isn't, and meet the great Stoic teachers: Marcus Aurelius, Epictetus, and Seneca. Move into the Intermediate level to apply Stoic thinking to real situations: work, love and marriage, personal growth, and the people around you. Reach the Advanced level to master your emotions, sharpen your judgment, and build the kind of inner steadiness that lasts. What's inside: · 100+ bite-sized lessons, each with an original story · A quiz after every lesson to lock in what you've learned · Progress tracking across all 16 parts · Fully offline — no internet needed once downloaded · Available in English and Traditional Chinese (繁體中文) Free to explore. Lifetime to own. Five lessons are completely free. Unlock the full library with a single one-time purchase — no subscription, no recurring fees.