Polymath

Plans and pricing

A professional tool, priced accordingly.

Each plugin is a subscription. Buying here saves the App Store cut -- the web price is below the in-app price for the same plugin. You may pay monthly, or commit to one, five, or ten years for a deeper discount. Longer terms are for subjects you intend to stay with.

Choose a plugin

Languages

Russian

Full pymorphy2 morphology, offline dictionary, sentence analysis.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

Languages

Spanish

Conjugation, gender and number agreement, mood and aspect.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

Languages

Japanese

Morphology, pitch accent, script breakdown.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

Programming Languages

Rust

Idioms, lifetimes, unsafe, ecosystem crates.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

Pure Mathematics

Linear Algebra

Vectors, matrices, spectral theory, the geometry underneath.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

Artificial Intelligence

Machine Learning

Foundations: supervised, unsupervised, bias-variance, the essentials first-principles.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

Quantitative Finance

Systematic Trading

Backtesting, walk-forward validation, regime detection, execution.

  • Monthly£30 / monthbilled monthly, 14-day free trial
  • 1 year£30 / month£360 upfront, price-locked for 12 months
  • 5 years£28 / month£1,680 upfront, price-locked for 5 years
  • 10 years£26 / month£3,120 upfront, price-locked for 10 years

Signed in? The email above is ignored and your account email is used instead.

The small print

  • Monthly plans include a fourteen-day free trial. Multi-year plans are paid up front and auto-renew at the end of the committed term.
  • All prices in pounds sterling, VAT applied where required, collected automatically by Stripe. Payment details are handled entirely by Stripe; we never see your card number.
  • Cancel at any time from your account page. Cancellation stops the next renewal; access continues to the end of the current term. No pro-rata refunds on active periods.
  • UK and EU consumers have a fourteen-day cooling-off right under distance-selling law for multi-year plans that have not yet been activated. You waive this right at checkout when you proceed to pay and are granted immediate access.
  • Receipts are emailed automatically by Stripe and kept in your account portal indefinitely. Marketing email is strictly opt-in at checkout.