What is free, and what Plus adds
Everything that teaches is free and always will be — every course, every section, every flashcard and every quiz. An account is only ever asked for so your progress belongs to you rather than to one browser. Paid exists for the things that cost money to run.
What stays free, always
Download the IB SEHS study pack
The whole IB SEHS syllabus in one printable file — 207 pages, bilingual English and 中文, every topic, every section, every in-detail walkthrough and all 131 key terms defined.
Download the 207-page study pack (PDF)
Free while payments are being switched on.
Checkout is not live yet, so the pack is a plain public download rather than something behind a purchase you cannot complete. It becomes a Plus download the moment billing goes live.
Payments are not switched on yet.
The plans above are what the site is built to support. Buying is not live — the buttons explain the plan and ask you to sign in. Nothing on this page takes payment today, and no feature behind it is hidden behind a broken checkout.
If you are in mainland China.
Signing in uses Supabase, which can be slow or unreachable from some networks here. Everything that teaches works without signing in — that is deliberate, so a network problem never costs you access to the material. If sync is unreachable for you, the progress on this device still works.