Apps

Built a fully offline-capable Progressive Web App for CPA exam prep (Tax Compliance & Planning) — installable to your home screen, works without a connection, and runs entirely client-side in vanilla HTML/CSS/JavaScript with zero backend or framework. Deployed as a static site on Vercel with custom cache-control headers so service worker and manifest updates roll out immediately instead of going stale. Features an adaptive quiz engine (weak-area drilling, timed mode, custom quizzes, question-of-the-day), a full analytics dashboard (accuracy, streaks, topic breakdowns, weekly heatmap), multi-profile support with JSON backup/restore, and a built-in tutor that explains every question three ways — plain English, step-by-step, and "why the trap."