Liminal - Philosophy Made Easy

The philosophy degree you didn't take — in your pocket, in your own time. Liminal is a four-year curriculum in Western philosophy, designed to feel less like an app and more like a thoughtful course of study. From the Pre-Socratics of Miletus to contemporary debates over consciousness, you'll meet the thinkers, the ideas, and the questions that have shaped how we understand the world. WHAT'S INSIDE • 104 lessons across 23 courses, organized into four years • 48 philosopher profiles, from Thales to Simone de Beauvoir • 82 key terms in a searchable glossary • 16 classic thought experiments — Plato's Cave, the Trolley Problem, Mary the Color Scientist, and more • 23 quizzes with explanations for every answer • Spaced-repetition flashcards for the key terms • On-device audio narration of every lesson — listen on a walk, in the car, in bed • Home screen widgets: Quote, Term, and Philosopher of the day THE CURRICULUM Year 1: Foundations & Ancient — Plato, Aristotle, Stoicism, Epicureanism Year 2: Medieval & Early Modern — Augustine, Aquinas, Avicenna, Descartes, Spinoza, Locke, Hume Year 3: Modern — Kant, Hegel, Marx, Nietzsche, Mill, American Pragmatism Year 4: Contemporary — Wittgenstein, Heidegger, Sartre, Beauvoir, Foucault, Rawls, Kuhn DESIGNED THE WAY YOU ACTUALLY READ • Beautiful serif typography for long-form reading • Tap any key term in a lesson to jump straight to its glossary entry • Tap any philosopher's name to read their full profile • Bookmark lessons, philosophers, and terms • Take personal notes on any lesson or thought experiment • Full-text search across the entire curriculum • Light, dark, and tinted app icon NO ADS. NO SUBSCRIPTIONS. NO NETWORK. Liminal collects no data, serves no ads, and makes zero network calls. Every lesson, every philosopher, every quiz lives on your device. Buy it once. Own it forever. WHO IT'S FOR • Anyone who's always meant to read more philosophy • Students preparing for or supplementing an introductory course • Returning readers who want a structured guide back into the canon • Curious minds looking for something better to fill the in-between moments of the day Begin with Year 1, Lesson 1 — "What is Philosophy?" — or jump anywhere you like. Your progress is saved as you go.