Tony Yin

Pastopic

Free notes, topic-sorted questions and past papers for students sitting Cambridge IGCSE, O Level and A Level exams.

2026 · Web app · Solo

Past papers
12,103
Subjects
105
Worked solutions
21,000

Live and free to use

Pastopic home page: Cambridge subjects listed with note, topic and paper counts, and a search box.

Who it’s for

Students aged about 14 to 19 sitting Cambridge exams, anywhere in the world.

The idea

Cambridge revision material is spread across cluttered sites full of ads and sign-up walls. Pastopic puts each subject in one place, in the order you revise: read the notes, practise by topic, then sit the paper. There are no ads, no accounts and no cookies, and progress stays on the student’s own device.

My role

A solo project. I created and run Pastopic independently, leading its product direction, design, engineering decisions, content quality and releases.

What’s in it

  • Past papers with mark schemes, inserts and examiner reports for 105 subjects.
  • Topicals: every past question sorted by syllabus topic, with filters, practice mode, self-marking, timed papers and a builder that turns any set of questions into one PDF.
  • Notes and formula pages for each syllabus topic.
  • Worked solutions on their own pages, each checked against the official mark scheme, with every number recomputed by a script.
  • Mark my answer (beta): photograph your working and get each mark explained against the mark scheme.
  • A content pipeline that collects, classifies, de-duplicates and compresses the papers before anything is published.

So far

Launched in late September 2026. In the week of 6 to 13 October 2026, Pastopic’s own analytics counted about 3,960 unique browsers (one person on a phone and a laptop counts twice), and 62% of visits came from browsers that had visited before.

Everything free stays free. Paid mock-paper packs are announced for January 2027.

Paper, subject and solution counts are as shown on pastopic.com in November 2026.

Built with

Next.js, React, TypeScript, Tailwind, Supabase Postgres, Cloudflare R2, Vercel, Python, Claude API

Pastopic is independent and not affiliated with Cambridge.

If you’re building something, want to work together, or have a question about any of this, email me.

© 2026 Tony YinBased in New ZealandGitHub