The hardest parts of UPSC,
made playable.
Cortex teaches climatology on living, pokeable maps and machines — and turns any essay topic into a mind-map you can actually think in. The abstract, finally hands-on.
Every course, test and tool — free · Pay only for AI · Web & Android
Interactive course
Watch the monsoon happen.
From the first sunbeam to the Köppen map — every wind, cloud, cyclone and monsoon UPSC asks about, taught on living maps and machines you poke. Not walls of text.
- Cinematic, step-by-step lessons
- Real, pokeable climate simulations
- 100% of the GS-I climatology syllabus
- Free — every unit, start to finish
Unit 3 · The monsoon engine
Why does India’s monsoon reverse between summer and winter?
Writing tool
Think in maps, not blank pages.
Type any essay or Mains topic. Cortex drafts an editable mind-map — intro, constitutional links, case studies, counter-views, a way forward — that you expand, rewrite and rearrange until the argument is yours.
- A complete first draft, fully editable
- Expand or rewrite any branch
- Built for Essay & Mains structure
- AI-powered — a free allowance with every account
Pricing, in one screen
Everything is free. AI is the only paid part.
No locked chapters, no “premium” test series, no trial clock. An account gets you the whole library. The one thing that costs us money every time you use it is live AI — so that is the one thing we meter, and we publish the numbers.
Free with any account
Every course, start to finish
All guided courses, the visual explainers, the Geography Field Lab and the Inner Council ethics RPG — every chapter, nothing held back for subscribers.
Every test series
Full-length timed tests with a real server-held clock, All India Rank, the leaderboard and the deep post-test analysis.
Practice, flashcards and the Atlas
The whole MCQ practice bank, spaced-repetition flashcards, the interactive India and world maps, and the granular syllabus tracker.
Current affairs and the Writing Studio
The daily current-affairs desk, 89 mains PYQs, timed writing practice and your answer library — the editor itself is free to use.
Metered — free allowance, then paid
Doubt clearance
Ask Cortex on any lesson screen, plus the course and visual-explainer mentors — grounded in what is on your screen.
AI practice questions
Fresh prelims-style MCQs generated on demand for whatever you are reading. (The pre-written practice bank stays free and unlimited.)
AI answer-sheet correction
Upload your handwritten test copy and get marks, margin annotations and an examiner's verdict, answer by answer.
AI writing help
Live analysis of a mains answer as you draft it, brainstorm maps, the full holistic review, and AI-generated Idea Canvas mind-maps.
Free accounts get 120 AI messages a week and 5 handwritten answers marked a month, however many pages they run to. Cortex Pro raises both.
See the exact limitsStart with a single topic.
Free — every course, every test series, every tool. Pick climatology or open a blank canvas, and see the difference in ten minutes.