Liminal: Learn Philosophy

Stack Trace Studios LLC

In-app purchases

About this app

The philosophy degree you didn't take... in your pocket, in your own time.

A four-year course of study in Western philosophy: 104 lessons from the Pre-Socratics to contemporary thought, laid out as four years of numbered courses.

The first 10 lessons are free. One optional in-app purchase unlocks the remaining 94.

The Curriculum

Year 1 - Foundations & Ancient Philosophy (5 courses, 28 lessons)
1.1 Introduction to Philosophy; 1.2 Pre-Socratic Philosophy; 1.3 Socrates and Plato; 1.4 Aristotle; 1.5 Hellenistic & Late Antique Philosophy.

Year 2 - Medieval & Early Modern Philosophy (6 courses, 26 lessons)
2.1 Augustine and Patristic Philosophy; 2.2 Islamic and Jewish Philosophy; 2.3 Scholasticism; 2.4 Renaissance and Early Modern; 2.5 Continental Rationalism; 2.6 British Empiricism.

Year 3 - Modern Philosophy (5 courses, 21 lessons)
3.1 Kant's Critical Philosophy; 3.2 German Idealism; 3.3 Utilitarianism and Marx; 3.4 Schopenhauer, Kierkegaard, Nietzsche; 3.5 American Pragmatism.

Year 4 - Contemporary Philosophy (7 courses, 29 lessons)
4.1 Early Analytic Philosophy; 4.2 Phenomenology and Existentialism; 4.3 Critical Theory and Postmodernism; 4.4 Philosophy of Mind; 4.5 Philosophy of Language; 4.6 Contemporary Ethics and Political Philosophy; 4.7 Philosophy of Science.

What Is Included

- 104 lessons across 23 courses, with source-linked original paraphrases that name the author, work and passage locator
- 48 philosopher profiles, from Thales to Foucault
- An 82-term glossary, cross-linked from the lessons
- 23 quizzes, 319 questions, each with an explanation of the answer
- 16 thought experiments
- 10 branches of philosophy, linking through to the related courses, thinkers and terms
- Spaced review: flashcards over the 82 glossary terms, on a schedule that stretches as you get a term right
- Search across lessons, courses, philosophers and glossary entries
- Bookmarks and private notes
- Progress tracked per year and per course
- Read-aloud on any lesson, using the on-device system voice
- Three home-screen widgets: Daily Philosophy, Term of the Day, Philosopher of the Day

What It Costs

Liminal is free to download. The first 10 lessons are free - all of PHIL 1.1 and the first five lessons of PHIL 1.2 - and so is everything else in the app: all 48 philosopher profiles, the whole glossary, all 23 quizzes, the thought experiments, spaced review, search, notes and the widgets.

One optional in-app purchase unlocks the remaining 94 lessons. It is a one-time purchase, not a subscription. It restores on your other devices signed in to the same Google Account. There are no ads and nothing else to buy.

Scope

This is Western philosophy, from the Pre-Socratics to contemporary thought. Year 2 runs from the Church Fathers to the early moderns and gives Islamic and Jewish philosophy a course of its own: Avicenna, Averroes, Al-Ghazali and Maimonides alongside Augustine and Aquinas. The curriculum does not cover Eastern or Asian traditions.

There is no video, no discussion feed and no account-based cloud sync. Your progress is stored locally and may move through Android's system backup or device-transfer features.

Privacy

Liminal has no servers of its own. There is no sign-in, no analytics, no advertising identifier and no tracking. Your progress, bookmarks, notes and review schedule are stored in a database on your device. The app has no internet permission of its own; every lesson, quiz and profile is installed for offline reading. Google Play processes purchases and restores, and provides the studio an order record for an Android purchase. See the privacy policy for details.

Support: https://stacktrace-studios.com/support/liminal/android/
Privacy policy: https://stacktrace-studios.com/privacy/liminal/android/

What’s new

Source clarity update.

This version clearly labels source-linked original paraphrases throughout lessons, profiles, the daily idea and its widget. It also includes reviewed historical wording and reliability fixes.

A four-year course in Western philosophy: 104 lessons across 23 courses, 48 philosopher profiles, an 82-term glossary, 23 quizzes that explain every answer, and 16 thought experiments. The first 10 lessons are free; one purchase unlocks the remaining 94.