Kalviyogi
Smart digital bookshelf for serious learners.
Read unit- and chapter-wise with flip pages, zoom, bookmarks, and pick-up-where-you-left-off — built for students.
Built for Tamil Nadu learners
Kalviyogi brings structured digital reading into one calm bookshelf — so exam prep and textbooks feel as natural as turning a page.
Kalviyogi is an education platform focused on clear content delivery, practice, and everyday study tools. Book OS is the digital bookshelf inside that ecosystem — image and PDF books with a modern reader.
Students get chapter navigation, continue-reading, bookmarks, and Premium access for locked titles. Teachers and institutes publish once; learners read anywhere.
369 Tesla Edunivra Pvt Ltd
Innovation and execution wing powering the Kalviyogi ecosystem — digital learning products, assessments, and classroom-ready technology from Bodinayakanur, Tamil Nadu.
Our goal is simple: future-proof education tools that students actually use every day.
Everything you need to keep reading
One reader, tuned for textbooks and scanned notes — not a generic PDF viewer.