Multi-tenant · AI-safe by design

AI-Powered Digital Library for Indian Institutions

Read, listen, and chat with your books. Equip students with responsive EPUBs, page-accurate PDFs, natural Text‑to‑Speech, and Varta — the study assistant that answers doubts with strict textbook citations.

Built For:UniversitiesCollegesCoaching Institutes
PDLMS Reader

Chapter 4: Neural Networks

Highlight
Ask Varta
Varta
Explain backpropagation in simple terms.
Backpropagation is how the network learns from its mistakes.

↳ Source: Page 142, Para 3
Ask the book a question...
EPUB
PDF + Citations
Audiobook
Platform Capabilities

A Complete Ecosystem

Everything your institution needs to deliver a modern, AI-powered reading experience.

Core Reader

Multi-Format Library

One source, four modes. Students choose: responsive EPUB, page-accurate PDF, natural Text-to-Speech audiobooks, or AI-embedded chat via Varta.

Varta

Varta Study Assistant

Students can chat with any textbook. Get instant explanations, generate practice questions, create flashcards, and view precise paragraph-level citations.

Annotation & Sync

Built-in PDF Studio

Drawboard-like features inside the browser. Freehand ink, smart shapes, highlights, redaction, OCR, and audio notes — all directly on your PDFs.

Smart Notebook

Sanchika

Your evolving study archive. Sanchika automatically collects highlights, Varta explanations, and annotations across every book — revisit flashcards, summaries, and key points anytime.

For Admins & Teachers

Institutional Dashboards

Detailed usage analytics. Track most-read books, identify struggling chapters across batches, and monitor overall AI usage statistics.

Enterprise Grade

Secure for Bharat

Multi-tenant architecture ensuring data isolation. Custom SSO, strict role-based access controls, and compliance-ready infrastructure.

The Reading Experience

Four Ways to Read One Book

Upload once. Every title instantly becomes a reflowable EPUB, a page-accurate PDF, a natural-voice audiobook, and an AI you can talk to.

EPUB mode

Heat & Thermodynamics

Heat is a form of energy that flows from a body at higher temperature to one at lower temperature. The specific heat capacity of water is 4186 J/kg·K, making it an excellent thermal buffer in biological systems and a cornerstone of climate regulation.

Font size
Sepia
Reflowable

Switch modes anytime — your highlights, bookmarks, and progress sync across all four.

Launching 2026 · Founding institutions onboarding now
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Reading Modes
0
PDF Studio Tools
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Citation-Backed AI
0.9%
Uptime Target
Student Experience

A distraction-free reader that teaches back.

Why leave the textbook to search for answers? With PDLMS, the book itself becomes the tutor. Highlight, listen, and chat directly with the context of the page.

  • Distraction-free Reading

    Clean interface exactly respecting publisher layouts.

  • Chat with Varta

    Select a paragraph and ask Varta for an instant, citation-backed explanation.

  • Sanchika Smart Notebook

    All your highlights, flashcards, and AI explanations collected in one evolving archive.

  • Listen with Text-to-Speech

    Natural voice narration for every book. Listen on the bus, study at the desk.

142

Chapter 7: Heat & Thermodynamics

Heat is a form of energy that flows from a body at higher temperature to a body at lower temperature.

The specific heat capacity of water is 4186 J/kg·K, making it an excellent thermal buffer in biological systems.

When two substances at different temperatures are mixed, heat flows from the hotter to the cooler substance until thermal equilibrium is reached.

Convection occurs in fluids where heated particles rise and cooler particles sink, creating circulation currents...

Saved to Sanchika
Varta
Why is water's specific heat so high?
Water's high specific heat (4186 J/kg·K) is due to hydrogen bonding between molecules, which requires significant energy to break.
📄 p. 142, ¶2
2:34 / 8:12
TTS · Audiobook
PDLMS Admin
Class 10 · Physics · Heat & Thermodynamics

Struggling Chapter Heatmap

AI questions per chapter
Ch 1: Basics
12%
Ch 3: Conduction
34%
Ch 7: Thermodynamics
89%
Ch 9: Radiation
18%
Ch 12: Applications
45%
Assignments
82%
Complete this week
Varta Qs
437
Questions this week
↑ 12%vs last week
Books Assigned
3 titles · this batch
Chapters Skipped
Ch 7, Ch 12 · needs attention
Teacher & Admin Experience

See what they read.
Know what they skip.

Equip your faculty with X-ray vision. Understand class engagement, track assignment completion, and see precisely which chapters trigger the most AI questions.

  • Assign Books to Batches

    Instantly distribute required reading to specific semesters.

  • Struggling Chapter Heatmaps

    Identify the exact pages where students spend the most time.

  • Track Varta Question Volume

    See what topics are so confusing they require the Varta engine.

Varta

The book that answers back

Most AI guesses. Varta reads your textbook and answers only from it — with a citation you can verify on the page.

Varta grounded
Searching your book → 3 passages found
Explain latent heat in one line.
Latent heat is the energy absorbed or released during a phase change, without any change in temperature.
p. 148, ¶1 p. 149, fig 7.5
+ Flashcard+ Practice Q→ Sanchika
  • Paragraph-level citations

    Every claim links back to the exact page and paragraph in the source book.

  • Instant flashcards

    Turn any explanation into spaced-repetition cards in one tap.

  • Practice questions

    Generate exam-style questions from the chapter you're reading.

  • Saved to Sanchika

    Highlights, answers, and cards collect in one evolving study archive.

No hallucinations — if it isn't in the book, Varta says so.
Built-in PDF Studio

A full annotation studio, right in the browser.

No downloads, no separate app. Mark up any PDF with Drawboard-grade tools — then everything syncs to Sanchika and travels with the student across devices.

Freehand ink
Smart shapes
Highlight
Redaction
OCR search
Audio notes
— page 142 —
Fig 7.3 — Convection currents
shape
Audio note · 0:12
draw anywhere
Secure for Bharat

Enterprise-grade. Built for institutions.

From a single coaching centre to a multi-campus university — the same architecture scales without ever mixing one institution's data with another's.

Multi-tenant isolation

Every institution's data lives in its own logical boundary. One breach can never cross tenants.

Branch hierarchy

Model campuses, branches, and departments — assign books and seats per branch.

Role-based access

Granular roles for admins, faculty, librarians, and students. Least-privilege by default.

SSO ready

Single sign-on so students use one institutional identity across the campus stack.

Per-institution rolesDPDP-ready data handlingEncrypted at rest & in transitAudit-logged access
Built With Educators

Designed with our founding cohort

We're building PDLMS alongside deans, faculty, and students. These are the needs they voiced — the product is built to meet them.

"What we need is to move thousands of students to digital EPUBs without standing up new infrastructure — PDLMS is built to do exactly that."

D

Dean of Academics

Design-partner persona

Founding cohort

Illustrative voices from design-partner interviews · launching 2026

FAQ

Frequently Asked Questions

Everything you need to know about deploying PDLMS for your institution.

When you upload a textbook (PDF or EPUB), our Varta engine indexes the exact content. When a student asks a doubt, the AI constructs an answer strictly using the textbook's text and provides clickable citations to the exact page.
Sanchika is the personal study archive built into PDLMS. It automatically collects every highlight, annotation, AI explanation, and flashcard a student creates — across all their books — into one evolving notebook they can revisit any time.
Yes. Every institution gets a completely isolated database tenant. User queries, reading habits, and highlighting data are never shared across institutions or used to train public LLM models.
Absolutely. Our platform supports bulk uploads of PDFs and EPUBs. We automatically run OCR on scanned PDFs to ensure they are searchable and AI-ready.
Yes. Every book in your library gets natural, AI-powered Text-to-Speech narration. Students can listen on the go and seamlessly switch between reading and listening modes.
PDLMS uses responsive rendering engines (EPUB.js and PDF.js). Textbooks automatically reflow and scale perfectly for mobile browsers and tablets without requiring a dedicated app download.

Bring an AI-Powered Library to Your Institution

Join leading schools and universities. Book a live demo to see how Varta and our multi-tenant architecture can transform your campus reading experience today.