Smart revision,
real results

FourtyFive is an AI-powered IB revision platform that combines a bank of IB-style questions with AI marking, personalised recommendations and exam-mode practice. It learns from every answer you submit, builds a topic-level mastery profile, and tells you exactly what to revise next — so your IB Diploma preparation becomes data-driven instead of guesswork.

FourtyFive currently covers six IB Diploma subjects at both SL and HL: Mathematics: Analysis and Approaches (Math AA), Mathematics: Applications and Interpretation (Math AI), Physics, Chemistry, Biology and Economics. Every question is tagged to the current IB syllabus and marked against real IB mark schemes.

Yes — there is a Free plan that covers personalised revision, topic rating and 50 AI-marked checks a month. The Pro plan raises that to 150 checks and adds AI Tutor Chat and on-demand similar questions with mark schemes, at one monthly price via Stripe.

After every answer the algorithm runs a three-layer mastery model: it scores the attempt with a dual-decay weighted average that factors in question difficulty and answering speed, recalculates your memory half-life on that topic, and calibrates statistical confidence in the result. Topics with fading retention, low scores at high confidence, or sudden drops in performance get prioritised in your next session — so you spend revision time where it actually matters.

Yes. FourtyFive is iPad-first and natively supports Apple Pencil handwriting for working out Math, Physics, Chemistry, Biology and Economics answers. The AI Examiner marks handwritten answers to the same IB mark scheme standard as typed answers — your handwriting is never penalised.

FourtyFive's AI Examiner is built around real IB mark schemes and command-term rubrics, not generic feedback. Instead of a vague "good answer", you see exactly which marks you earned (M1, A1, R1…), which you lost and why, and a worked solution written the way an IB examiner would mark it. Generic chatbots don't know IB mark schemes — they guess.

Most IB question banks give you questions and a solution; FourtyFive closes the loop by marking your answer, building a mastery profile from every attempt, and recommending the next best thing to revise. It also natively supports handwritten Apple Pencil answers — most competitors only accept typed input — and pairs a dedicated personalisation engine with six core IB subjects rather than a static library.

Yes. Exam mode runs the same question system as personalised practice but under a time budget you set, so you can simulate real IB paper pressure. The AI Examiner marks your timed attempts and feeds the results back into your mastery profile, surfacing pacing weaknesses alongside content gaps.

Yes. Every question is tagged to the current IB Diploma Programme syllabus and reviewed when the IBO updates a course, so you never practice on retired material. Coverage includes the latest specifications for Math AA, Math AI, Physics, Chemistry, Biology and Economics at SL and HL.

Most students see a measurable shift in their predicted IB grade within 3–4 weeks of consistent practice — around 20 minutes a day. Because the personalised recommendations focus your time on the topics with the highest mastery deficit, the time-to-impact is usually faster than open-ended revision through past papers.

45 is the maximum score on the IB Diploma — seven points each on six subjects plus three from Theory of Knowledge and the Extended Essay. The name reflects the platform's IB-specific focus: the algorithm, AI marking and question bank are built around the Diploma Programme, not a generic edtech model.

Yes. FourtyFive Pro is a Stripe subscription you can cancel at any point in your account settings, and your Pro features stay active until the end of the month you have already paid for.