StudyThem vs Enchiridion

Discover what the greatest people in history were doing at your age. StudyThem is a visual history and biography app that explores the lives of famous people and historical figures through the lens of age. Instead of reading long biographies, StudyThem reveals the key moments that shaped extraordinary lives - from childhood struggles to world-changing breakthroughs. Discover what scientists, leaders, explorers, inventors, artists, and creators were experiencing at every stage of life. Browse interactive life timelines and see turning points from people like: • Nikola Tesla • Marie Curie • Abraham Lincoln • Ernest Shackleton • Leonardo da Vinci • Albert Einstein Compare different lives at the same age and gain a new perspective on growth, success, failure, perseverance, and discovery. You might discover: • what Tesla struggled with in his 20s • what Curie was studying at 24 • what Lincoln was facing at 35 • what explorers endured before becoming legends History becomes more powerful when you see how great lives unfolded across time. StudyThem is designed for calm exploration, reflection, and learning — not endless scrolling, not noise. Features: • Visual timelines of famous people and historical figures • Key life moments, struggles, and achievements • Compare different lives at the same age • Learn history through real human stories • Clean, focused design with no distractions Perfect for people interested in: history biographies famous people historical figures personal growth inspiration learning from great minds

Learn anything. Remember it for life. Enchiridion turns big subjects into short daily sessions that stick. Answer a few cards, read the reasoning behind every answer, and let spaced repetition decide when you see each idea again — right before you'd forget it. WHAT'S INSIDE • 9 learning paths: Become an Adult (taxes, insurance, contracts), Taxes & Money, Health & Wellness, Psychology & Mind, Philosophy, Science & Nature, World History, Tech & AI, Art & Culture • 3,000+ original quiz cards, each with a plain-English explanation and feedback that names the exact misconception behind a wrong answer • 324 deep-dive articles (typically 4,000–6,500 words) with named sources and further reading — the "why" behind the facts • Verified content: 1,500+ cards fact-checked against primary sources (IRS, SSA, NIST, peer-reviewed literature); tax and money figures use the 2026 IRS numbers HOW IT WORKS • Scheduling runs on the open FSRS-5 spaced-repetition algorithm with per-card adaptive difficulty, so review intervals truly expand as you learn • Story moments: short, skippable dialogue from characters tied to each path appears halfway through a session — turn it off anytime in Settings • Golden cards, speed bonuses, combo cheers, streaks, daily quests, and level-ups keep sessions warm without getting in the way • Deep dives render real tables — truth tables, tax brackets, fund comparisons • iCloud sync keeps progress across your devices WHO IT'S FOR • Lifelong learners who want durable knowledge, not trivia • Adults catching up on the practical things nobody taught them • Students and professionals who need retention, not cramming The name comes from the Greek word for handbook: a practical guide you carry with you. SUBSCRIPTION NOTICE • Enchiridion offers auto-renewing subscriptions for full access to all paths, deep dives, study sessions, sync, and progress tools • 7-day free trial available for eligible new subscribers • Payment is charged to your Apple ID at confirmation of purchase • Subscriptions renew automatically unless canceled at least 24 hours before the end of the free trial or current period • Manage or cancel anytime in your App Store account settings • Privacy Policy: https://enchiridion.io/privacy • Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Public service terms: https://enchiridion.io/terms