Pi Lens-Notes, PYQs on YouTube

Physicswallah

About this app

Turn any educational YouTube video into a complete study session. Pi Lens sits right next to your lecture and gives you everything you need to actually learn from it — not just watch it.

Whether you're preparing for Class 9-12 Boards, IIT-JEE, NEET, CUET, UPSC, State Boards, or MHT-CET, Pi Lens helps you learn, revise, test yourself, practice, and access curated Notes from PhysicsWallah's (PW) own teachers.

What Pi Lens gives you on every study video:

📚 Notes on any youtube video
Mindmaps, formula sheets, short notes, lecture slides, and curated PDFs - all mapped to the chapters being taught in the Youtube video.

📋 Video Summary
A structured summary notes of the YouTube lecture, auto-generated from the video - so you can review in 2 minutes what took 90 minutes to watch.

📝 Previous Year Questions (PYQs)
Chapter-matched exact PYQs from the last 5 years' exam data, ready for you to practice anytime.

⚡ Instant Quiz
Test yourself on exactly what was taught in the video - questions built from the video’s content.

📊 Live Polls
Participate in real-time polls during PhysicsWallah’s live classes. Stay active, stay ahead

What's More for You:

📁 PDF Bank
Highly curated 1000+ PW's faculty Notes and PDFs for JEE, NEET, CUET, UPSC and Board Exam preparation - all in one place.

🧪 Concept Lab
Turn your own handwritten notes or your favourite YouTube video into interactive simulations, mind maps & flashcards - a one-stop revision tool for tough concepts.

⚔️ 1v1 Battle
Challenge a friend and beat them on your favourite chapter - a fun way to make studies competitive.

4,50,000+ students use Pi Lens on Android and Chrome to study smarter on YouTube.

🎯 Why students choose Pi Lens:
1. Made specifically for students who learn on Youtube
2. Zero friction: No searching for study material, PDFs or Notes, find everything in one place
3. Minimal & distraction-free
4. Built for the students of India by PhysicsWallah, using the power of AI

⚠️ Important Disclaimer
Pi Lens App is an independent educational tool and is not affiliated with or endorsed by YouTube.

What’s new

🚀 What’s New
🎯 Find your PW batch: Discover PhysicsWallah batches tailored to your exam and class right from Home
⚔️ 1v1 Battle, now smoother: Improved Battle navigation when opening from notifications and external links
🛡️ Better & safer: Security and stability improvements for a smoother experience.