Enchiridion vs Liminal

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

Explore Western philosophy through 104 lessons arranged into 23 courses and four year-groupings. Start with philosophical questions and ancient thinkers, then move through medieval, early modern, modern and contemporary thought. Study at your own pace. START WITH 10 FREE LESSONS The first 10 lessons are free. One optional, non-subscription in-app purchase unlocks the remaining 94. The reference and practice features below are available without that purchase. FOLLOW A STRUCTURED PATH Year 1: Foundations and ancient philosophy. Year 2: Medieval and early modern philosophy, including a course on Islamic and Jewish thinkers. Year 3: Modern philosophy, from Kant to pragmatism. Year 4: Contemporary philosophy, including language, mind, ethics, political philosophy and science. READ, QUESTION AND REVIEW - 48 philosopher profiles and an 82-term glossary. - 23 practice quizzes with 319 questions and answer explanations. - 16 thought experiments and 10 branches to explore. - Spaced review of glossary terms. - Search across lessons, courses, profiles and glossary entries. - Bookmarks, personal notes and study-progress views. - Lesson read-aloud using your device's system voice. - Home Screen widgets for a daily philosophical idea, term and thinker. STUDY INTERPRETATIONS WITH REFERENCES Dedicated source cards, daily ideas and profile passages present Liminal's original paraphrases with citations. They are interpretations for study, not verbatim translations of the cited works. READ WITHOUT A CONNECTION Lesson and reference text is bundled for offline reading, subject to the lesson unlock. Buying, restoring, checking changed purchase access and opening external links may require a connection. Narration uses the voices available on your device.