Enchiridion vs concepts.

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

Upgrade your thinking, 2 minutes a day. concepts. delivers powerful mental models daily. No courses. No commitment. Just growth. WHAT YOU GET: One thought-provoking concept every day 500+ concepts across 50+ categories Mental models from philosophy, psychology, science, and strategy Clear explanations designed for instant understanding Counterintuitive insights that shift perspectives Actionable steps to apply immediately HOW IT WORKS: Each concept follows a simple structure: The Concept - Clear explanation that clicks The Twist - Counterintuitive insight that shifts thinking The Action - Immediate application, not "someday" EXPLORE BY CATEGORY: Discover concepts across diverse fields: Philosophy & Ethics Psychology & Behavioral Science Strategy & Game Theory Economics & Finance Artificial Intelligence & Machine Learning Neuroscience & Cognitive Science Design Thinking & Creativity 40+ additional categories FEATURES: Daily curated concept feed Browse by category or popularity Pin concepts for later review Like valuable concepts Clean, distraction-free interface Offline access - read anytime PERFECT FOR: Writers & Creators seeking fresh perspectives Founders & Operators making critical decisions Anyone who values meaningful conversations Lifelong learners wanting depth without time commitment PRICING: Free 3-day trial, then $0.99/week. Build a mental library you can draw from when you need a new angle on a problem. The goal isn't memorization—it's expanding how you think. Questions? Contact tim@conceptsapp.live Community: discord.gg/sAsKjB4a Terms of Use: https://conceptsapp.live/terms