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Free revision tools for every subject
Calculators, builders and interactive revision tools. No account, no credits, no card details.
Always free, no login requiredWhen to use itFor the fiddly steps you get wrong under time pressure.
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GCSE
Biology2 tools
- The nitrogen cycleFixation, nitrification, uptake, decomposition and denitrification on one map, with the bacteria on each arrow and notes for your exam board. A quiz and exam questions.
- Genetic crosses and Punnett squaresPick a cross and the parents’ genotypes and get the genetic diagram, the Punnett square, the ratio and the probability, with the topics your exam board names. Sex determination, family trees, a quiz and exam questions.
A-Level
Biology6 tools
- The light-dependent reactionPhotosystems, photolysis and ATP synthase on one map, in your exam board’s wording. Cyclic and non-cyclic flow, a quiz and exam questions.
- The Calvin cycleThe light-independent reaction on one map, in your exam board’s wording. Carbon count, a quiz and exam questions.
- The Krebs cycleThe link reaction and the Krebs cycle on one map, in your exam board’s wording. CO₂, reduced coenzymes and ATP counted, a quiz and exam questions.
- The immune responseFrom phagocytosis to memory cells on one map, in your exam board’s wording. Primary and secondary responses, a quiz and exam questions.
- The nitrogen cycleFixation, nitrification, uptake, decomposition and denitrification on one map, with the bacteria on each arrow, in your exam board’s wording. A quiz and exam questions.
- Genetic crosses and Punnett squaresPick a cross and the parents’ genotypes and get the genetic diagram, the Punnett square and the ratios, in your exam board’s scope. Dihybrid, sex-linked, linkage and epistasis, family trees, a chi-squared calculator, a quiz and exam questions.
The library is being built
New tools for all subjects are being built and will be added here. If you have any suggestions for what you need right now, contact us below.
Tell me what to build firstIt goes straight to me, not a support desk.
First tools being built
- Mole calculator
- Equation balancer
- Half-equation builder
- pH and pOH calculator
- SUVAT solver, with the working shown
- Genetic cross calculator
- Spaced repetition flashcard engine
- AD/AS shock simulator
- Key studies card set and quiz
More subjects follow. The list above is where it starts, not where it stops.