Adaquiz
Level up your coding skills with adaptive quizzes for JavaScript, Python, Go, Rust, Java, and C++. Track your progress, identify weaknesses, and become a better programmer. Free to start!
Categories:
AdaQuiz
Master Programming Languages with Interactive Quizzes
🎯 Overview
AdaQuiz is a modern, production-ready Progressive Web App (PWA) for mastering programming languages through interactive quizzes. Built with Next.js 16 and React 19, it features adaptive learning using spaced repetition (SM-2 algorithm), AI-generated questions, and comprehensive analytics.
Live at: adaquiz.online
Key Highlights
- 🧠 Adaptive Learning - SM-2 spaced repetition algorithm optimizes review timing
- 🤖 AI-Generated Questions - Fresh content powered by OpenAI GPT-4
- 📊 Performance Analytics - Track progress, identify weaknesses, visualize trends
- 📱 PWA Support - Works offline, installable as native app
- 🔒 Enterprise Security - CSP headers, RLS policies, rate limiting
- ✅ 405 Tests - Comprehensive test coverage with Vitest
✨ Features
Core Functionality
- 6 Programming Languages: JavaScript, Python, Go, Rust, Java, C++
- 3 Difficulty Levels: Easy, Medium, Hard
- Quiz Management:
- Auto-save progress (resume incomplete quizzes)
- Keyboard shortcuts (1-5 for answers, Enter to submit, arrows to navigate)
- Timer with remaining time display
- Mark questions for review
Learning Features
- Spaced Repetition: SM-2 algorithm tracks individual question performance
- Smart Question Selection: Prioritizes due reviews → fresh questions → retry questions
- Detailed Explanations: Every question includes explanations for correct answers
- Question Reporting: Users can flag incorrect or unclear questions
User Tiers
| Tier | Daily Quizzes | Questions/Quiz | Difficulty | Features |
|---|---|---|---|---|
| Free | 1 | 25 | Easy, Medium | Basic stats |
| Plus ($5.99/mo) | 5 | 25 | Easy, Medium, Hard | Basic stats |
| Pro ($9.99/mo) | 15 | 40 | All | Advanced insights, charts, data export |
Pro Features
- Performance Charts: Recharts visualizations of progress over time
- Weakness Detection: Identifies struggling topics
- Trend Analysis: Compares recent vs. historical performance
- Data Export: JSON/CSV export of quiz history
Technical Features
- PWA: Offline support, installable, background sync
- Security: CSP headers, Row-Level Security (RLS), rate limiting
- Analytics: Vercel Analytics & Speed Insights
- Accessibility: WCAG compliant, keyboard navigation, screen reader support
- Responsive: Mobile-first design with tablet/desktop optimization
🛠 Tech Stack
Frontend
- Framework: Next.js 16.1.4 (App Router, React Server Components)
- UI: React 19.2.3, TypeScript 5
- Styling: Tailwind CSS 4, shadcn/ui components
- State: React hooks, server actions
- Charts: Recharts (Pro analytics)
Backend
- Database: PostgreSQL via Supabase
- Auth: Supabase Auth (email, OAuth)
- Payments: DodoPayments (subscriptions)
- AI: OpenAI GPT-4 (question generation)
- Rate Limiting: Upstash Redis
DevOps
- Hosting: Vercel
- CI/CD: GitHub Actions
- Testing: Vitest, React Testing Library
- Monitoring: Vercel Analytics, Speed Insights
🙏 Acknowledgments
- shadcn/ui for beautiful components
- Supabase for auth and database
- DodoPayments for subscription handling
- OpenAI for AI-generated questions
- Vercel for hosting and analytics
Built with ❤️ by the AdaQuiz Team
Similar apps
OA.mg · Open Access for Everyone · Download and read over 240 million research papers
oa.mg
Download and read 240 million open access research papers
Top Frontend Interview Questions And Answers
frontendinterviewquestions.com
Looking for frontend interview questions? Frontendinterviewquestions.com provides JavaScript, Angular, React, CSS3, HTML5 interview questions and answers
Evergreen ILS
evergreen-ils.org
Open Source Library Software
JavaScript Tutorial
javascripttutorial.net
JavaScript Tutorial provides you with many practical tutorials that help you learn JavaScript from scratch quickly and effectively.