Start with what you will actually sell
Before comparing libraries, write down the classes, subjects and language your customers will pay for in the next twelve months. An app for Class 9 to 12 Science students needs depth in Physics, Chemistry and Biology. A smart-class business selling to primary schools needs Class 1 to 5 foundations. A coaching chain may only need Class 6 to 10.
That list decides whether you need a complete Class 1 to 12 library or a smaller class range, and it stops you paying for coverage you will not use, or discovering a gap after launch.
Check coverage chapter by chapter, not by totals
Libraries are usually sold on totals, but a total mixes different things: concept lessons, solved textbook questions, MCQs, notes and chapter counts. Ask the supplier to separate them. Then ask for the full chapter list, and ideally the title of every lesson inside each chapter.
A chapter with one three-minute video and a chapter with fourteen lessons both count as "covered". Lesson titles show you the difference immediately. Our own catalogue lists every Class 6 to 12 lesson title for exactly this reason: browse the catalogue.
Check the chapters your customers find hardest, not the easy ones at the start of the book. If those are thin, the library will not hold students.
Ask which syllabus and textbook edition it follows
"CBSE-aligned" is not specific enough. NCERT has been replacing its middle-school textbooks since 2024, and CBSE removed a number of senior-secondary chapters from its syllabus in 2023. A library made for an earlier edition can still be useful, but you need to know which chapters map to the books your learners use today.
Ask the supplier which textbook edition each class was mapped to, which chapters were dropped from the current syllabus, and whether any current chapters are missing. A good supplier will answer plainly.
Watch full samples on the devices your learners use
Trailers and highlight reels are made to impress. Ask for complete lessons from several classes and watch them on the actual screens your customers use: a phone, a classroom panel, a laptop.
Check the picture shape and resolution (a 4:3 lesson looks different on a widescreen panel), whether the voice is clear at classroom volume, whether captions are included and accurate, and whether the pace suits the class level. If you plan a Hindi edition, check whether it is a voice-over or fully Hindi on screen; they are different products.
Read the licence, not the slogan
"Lifetime rights" and "buy once, sell forever" are summaries. The licence agreement is what applies. Before you pay, get clear written answers on five points: whether the licence is exclusive or non-exclusive, where you may use and sell the content, whether you may resell or sublicense the library itself to other companies, whether you may edit or translate it, and who owns the underlying intellectual property.
Also ask whether editable source files are included or licensed separately, because translation and deep changes need them. We have published our own answers in plain language: what our licence includes.
Confirm formats and what "delivered" means
Find out whether you receive files you host yourself or access to the supplier's platform. Files (for example MP4 video with WebVTT captions and PDF notes) work in any LMS, app or panel and stay with you. Platform access usually ends when the contract does.
Ask what the delivery time covers: the complete library or a first batch, with or without your branding applied, and when the clock starts.
Price the whole cost, not just the licence
Add up everything you will pay: the licence, taxes, any extra language edition, source files if you need them, hosting and bandwidth, and your own integration time. Then compare that with the alternatives honestly. A per-student subscription grows with every learner you add; building in-house takes a production team and a long runway before you have a full library. Our buy vs build comparison shows how we think about that trade-off.
A short checklist to take into the call
Separate totals by type. See every chapter and lesson title. Confirm the textbook edition per class. Watch full samples on your own devices. Get the licence terms in writing. Confirm file formats and the delivery scope. Add up the full cost. If a supplier is vague on any of these, treat that as the answer.
Quick answers
A ready-made set of CBSE/NCERT-aligned lessons, questions and notes that you license and deliver to your own learners under your own brand, instead of producing the content yourself.
Buy what your customers will pay for in the next year. A complete library suits platforms selling across all classes; a class range suits businesses focused on, say, Class 6 to 10 or Class 11 to 12.
Ask for the full chapter list with lesson titles, and watch complete lessons from the hardest chapters in the classes you sell.