v 0.2.0 · Released 14 May 2026 Open Source · MIT

A desk for the
study of Objectivism,
& the discipline of reason.

RationalHub is a native desktop application that gathers the apparatus of serious philosophical study — structured courses, spaced‑repetition flashcards, a searchable encyclopedia, an annotating ebook reader, a Socratic AI tutor, and dialectic games — under one quiet roof.

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Today · 12 cards due
Epistemology · Concept Formation
"What is the genus‑differentia method of definition?"
Tap to reveal · Press 1–4 to grade recall
Streak · 47d Retention 92% Next: Causality
§ 01 · Get the app

Available on every desk.

Free · Open source · ~ 96 MB
Microsoft — for PC
Windows
Windows 10 or later
Tux — for Linux
Linux
x64 · Ubuntu 20.04+
All releases & SHA‑256 checksums on GitHub Releases →
§ 02 · The instruments

Six tools for one discipline.

All offline · All local‑first
01
Pedagogy

Structured Courses

Work through curated lesson sequences in epistemology, ethics, metaphysics, and aesthetics — each unit closes with a written exercise the app remembers.

02
Memory

Spaced Repetition

A built-in flashcard system on the FSRS algorithm keeps the concepts you need most at the front, and the rest in proper proportion.

03
Reference

Encyclopedia

A searchable, internally cross-linked reference covering the key concepts, thinkers, and works across the Objectivist canon and its critics.

04
Dialectic

AI Socratic Tutor

Ask questions, stress-test your reasoning, and practice guided dialectic with an AI tutor trained to interrogate premises — not flatter conclusions.

05
Reading

Ebook Reader

Read and annotate EPUB titles inside the app, with one-keystroke dictionary lookup and a notebook that braids your margin notes into your flashcards.

06
Practice

Philosophy Games

Genus‑differentia, Fallacy Fighter, and Concept‑Mapping — three short games that turn the work of definition into a daily, almost-playful habit.

"

The mind is not a passive recipient. It is an instrument — and like any instrument, it rewards the patient labour of sharpening.

From the RationalHub introductory lecture
§ 03 · Curriculum

A curriculum that doesn't end at the syllabus.

Each lesson layers a short reading with worked examples, a flashcard deck, and a Socratic check-in. The app tracks the integration between them, so a half-remembered concept from chapter two surfaces again in a game three weeks later.

142+
Lessons
3,400+
Flashcards
28
Hours of audio
Tutor sessions
Unit I · Foundations of Reason 7 lessons · 4h 20m
i.
The Axioms Existence, identity, consciousness
28 min Start
ii.
Concepts & Percepts How abstractions are built from sense data
34 min Lesson
iii.
Definition by Genus & Differentia The structure of a working definition
42 min Lesson
iv.
The Stolen Concept Recognising self-refuting arguments
26 min Lesson
v.
Causality & Identity Why action is the entity acting
31 min Lesson
vi.
Reason as the Means of Knowledge The faculty, the method, the obligation
38 min Lesson
vii.
Review & Socratic Exam AI-led oral examination on Unit I
45 min Exam

A quiet desk, an honest method, and the time to think clearly.