Equation Encyclopedia

Master 3,000+ Formulas, 170+ Expert Study Guides, and AI Study Tools

Equation Encyclopedia brings AP, SAT, ACT, college, and professional study into one app. Search 3,000+ formulas across Mathematics, Physics, Chemistry, Biology, Engineering, Finance, Geography, Medicine, Computing, Geology, Psychology, Economics, Sociology, and Quantum Computing, with offline access after login.

FORMULA LIBRARY

- 3,000+ formulas across AP, college-prep, and university pathways

- Coverage mapped across College Board (AP), Common Core, Next Generation Science Standards (NGSS), IB, Cambridge, and broader US and international systems

- Interactive formula preview with intuition, derivations, rearrangements, mnemonics, comparisons, and step-by-step practice problem solutions

EXPERT STUDY GUIDES

- 170+ Expert Study Guides built from formulas, derivations, rearrangements, mnemonics, intuition, history, and practice

- 3 free sample guides on the free plan, with the full guide library available on paid plans

- Extra spreadsheet, coding, and reference study packs for broader study workflows

50+ INTERACTIVE GAMES

- Equation Zillionaire, Solve It, Unit Crunch, Symbol Rush, Formula Run, Equation Sleuth, Logic Linker, and more

- XP levels, daily streaks, achievement badges, and global leaderboards

AI-POWERED TOOLS

- AI Equation Mentor to explain, rearrange, and solve formulas step by step

- AI Image Scanner to identify equations from photos

- AI Study Tool, AI guide generation, and AI-assisted calculator building

- AI spreadsheet and coding explainers for practical problem solving

CREATE, PROGRESS, AND SCIENTISTS

- Create page now supports typing, uploading handwriting, or drawing equations before sending them through Store AI

- Progress is stronger with Equation Skill Check, weak-equation analytics, subject insights, and next-best-study actions

- Separate scientist experiences: collect 100 scientist cards in Scientist Collection, then explore 800+ scientists on the broader Scientists Page

REFERENCE AND LIFESTYLE TOOLS

- Full Periodic Table, Physical Constants, Unit Conversions, Greek Alphabet, and Math Rules

- 468+ Did You Know facts and equation-linked historical context

- 6 new lifestyle and finance calculators: Salary Cost-of-Living Adjuster, Portfolio Growth Planner, Mortgage Cost Planner, Rent vs Buy Comparator, Emergency Fund Planner, and Budget Split Planner

PERFECT FOR

AP, SAT, ACT, college students, finance professionals, developers, Excel users, and independent learners

UI available in English plus 17 translated languages. Deeper formula, calculator, Excel, coding, and study content is localized across 10 translated data languages.

PLANS

- Free: full library access, sample Expert Study Guides, games, and reference tools

- Plus: $6.99/month or $49.99/year for unlimited saves, full Expert Study Guide access, create tools, exports, and ad-free study

- Pro: $10.99/month or $99.99/year for everything in Plus plus AI Mentor, Image Scanner, AI study workflows, and advanced creation tools

- Ultra: $17.99/month or $149.99/year for everything in Pro plus the highest AI priority and heavier daily AI usage

Zero ads on all paid plans.

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