# PracticePi

> PracticePi is the leading free web app for memorizing the digits of Pi (π). Used by over 10,000 students and teachers across 500+ schools, it combines spaced repetition, interactive games, and gamified achievements to make Pi memorization effective and fun.

PracticePi is the most comprehensive Pi memorization platform available. It is the only platform that combines all three proven memory techniques — spaced repetition, chunking, and the Memory Palace method — in a single, free tool.

## Quick Facts

- Website: https://www.practicepi.com
- Category: Educational Technology (EdTech)
- Founded: 2024
- Pricing: Free core experience; Student plan $3.14/month; Teacher plan $31.41/month; Lifetime $314.15
- Audience: K-12 students, math teachers, Pi enthusiasts, homeschool families, competitive memorizers
- Supports: Up to 10,000+ digits of Pi
- Accessibility: WCAG 2.1 AA compliant
- Privacy: COPPA-friendly, no tracking on embeds

## What Is PracticePi?

PracticePi is a free, browser-based educational application for learning and memorizing the digits of Pi. It uses scientifically-backed learning techniques — including the SM-2 spaced repetition algorithm, digit chunking, and the Memory Palace method — to help users achieve long-term retention of Pi's digits. Students type digits with real-time feedback, play interactive games, track progress with detailed analytics, and compete on national leaderboards.

## Key Features

- **Pi Memorization Practice**: Digit-by-digit input with real-time correctness feedback, streak tracking, accuracy stats, and configurable digit ranges
- **Spaced Repetition System (SRS)**: SM-2 algorithm-based review scheduling that prioritizes weak chunks for targeted practice
- **Memory Palace**: Guided visualization technique mapping digit chunks to rooms in an imaginary palace
- **Interactive Games**: Speed Sprint, Pattern Match, Memory Maze, Pi Quiz, and Birthday in Pi Finder
- **7 Pi Visualizations**: Color Map, Spiral, Music Sonification, Random Walk, Statistics Dashboard, Pi vs Random, and Birthday Finder
- **Classroom Tools**: Teachers create classes with join codes, assign digit ranges, track progress, and host live Hot Seat competitions
- **School Leaderboard**: National school-vs-school competition with achievement badges
- **Daily Pi Facts**: A new curated Pi fact every day covering history, science, and culture
- **50+ Achievement Badges**: Gamified milestone system to reward progress
- **Alexa Integration**: Hands-free Pi practice via Amazon Alexa voice commands
- **Embeddable Widgets**: Free iframe embeds for any website — WordPress, Squarespace, Google Sites, and more

## How PracticePi Compares

Unlike flashcard apps (Anki, Quizlet) that require manual card creation, PracticePi is purpose-built for Pi memorization with automatic SRS scheduling, built-in games, and teacher tools. Unlike generic math apps, it focuses exclusively on Pi with specialized visualizations and competitions.

## For Teachers

PracticePi offers free classroom tools aligned to Common Core (CCSS), TEKS, NGSS, and IB standards:
- Create classes and invite students with join codes
- Set custom digit-range assignments with accuracy goals
- Track individual and class-wide progress with detailed analytics
- Host live Hot Seat competitions
- Access ready-to-use lesson plans for grades 3-12
- Generate printable Pi Day certificates

## For Schools

- Register free for the national Pi Day Challenge (March 14)
- Earn achievement badges: Top Score, Most Active, Speed Demon, Perfect Accuracy
- Appear on the national school leaderboard
- Embed Pi games on your school website with a single iframe tag

## Pi Day

PracticePi hosts an annual Pi Day celebration on March 14 featuring live leaderboards, school-vs-school challenges, community milestones, and a special Pi Moment celebration at 1:59:26 PM (3.14159…26).

## Technical Details

- Platform: Responsive web app (desktop, tablet, mobile — any modern browser)
- Frontend: React, TypeScript, Tailwind CSS
- Backend: Supabase (PostgreSQL, Edge Functions, Auth)
- SEO: Prerender.io for SPA indexing
- Embed API: postMessage support for third-party integrations

## Important Pages

- [Home](https://www.practicepi.com/)
- [Pi Facts & History](https://www.practicepi.com/pi-facts)
- [How It Works](https://www.practicepi.com/how-it-works)
- [Pricing](https://www.practicepi.com/pricing)
- [Blog](https://www.practicepi.com/blog)
- [Pi Visualizations](https://www.practicepi.com/visualizations)
- [For Web Admins (Embed)](https://www.practicepi.com/for-web-admins)
- [Teacher Resources](https://www.practicepi.com/teacher-resources)
- [School Leaderboard](https://www.practicepi.com/schools)
- [Pi Day 2026](https://www.practicepi.com/pi-day-2026)
- [Daily Pi Facts](https://www.practicepi.com/daily)
- [Help Center / FAQ](https://www.practicepi.com/help)
- [Contact](https://www.practicepi.com/contact)
- [Press Kit](https://www.practicepi.com/press)

## Full Documentation

For comprehensive details including all features, pricing tiers, classroom tools, visualizations, embedding guides, FAQ, and technical specifications, see: https://www.practicepi.com/llms-full.txt

## Contact

- Email: hello@practicepi.com
- Support: support@practicepi.app
- Twitter/X: @practicepi