Pi Lens-Notes, PYQs on YouTube
Physicswallah
Turn any educational YouTube video into a complete study session. Pi Lens sits alongside YouTube and gives you everything you need to actually learn from what you're watching - not just watch it.
Whether you’re preparing for you board exams Class 9-12, JEE, NEET, CUET, UPSC, State Boards, MHTCET, Pi Lens helps you learn, revise, test concepts, practice and access curated notes instantly!
What Pi Lens gives you on every study video:
📚 Notes on any youtube video
Mindmap notes, 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 of the 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 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.
1,50,000+ 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, find everything in one place
3. Minimal & distraction-free
4. Built for the students of India
⚠️ Important Disclaimer
Pi Lens is an independent educational tool and is not affiliated with or endorsed by YouTube.
Whether you’re preparing for you board exams Class 9-12, JEE, NEET, CUET, UPSC, State Boards, MHTCET, Pi Lens helps you learn, revise, test concepts, practice and access curated notes instantly!
What Pi Lens gives you on every study video:
📚 Notes on any youtube video
Mindmap notes, 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 of the 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 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.
1,50,000+ 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, find everything in one place
3. Minimal & distraction-free
4. Built for the students of India
⚠️ Important Disclaimer
Pi Lens is an independent educational tool and is not affiliated with or endorsed by YouTube.
Developer email
pilens.support@pw.live
Released
Jan 19, 2026
Current version
1.2.9
Android version
8.0
Screenshots
