Frequently asked questions

Librava.ai is an AI-powered platform for creating print-ready actvity books, educational materials and low content books — including puzzle books, worksheets, colouring pages, journals, story books, and more. You describe what you want, the AI builds it, and you download a KDP-ready PDF in minutes.

None at all. Librava handles all layout, typography, and formatting. You simply choose a tool, enter a topic or prompt, and the AI does the rest. If you can type a sentence, you can create a professional book.

Any time, your imagination is the only limit. You can create: Crossword books, Word Search, Sudoku, Kakuro, Maze books, Criss-Cross, Cryptogram, Numberlink, Drop Quote, Bridges/Hashi, Worduko (letter Sudoku), Colouring Books, Puzzle Books, Journals, Story Books, Cover Maker, and Interior Designer.

Yes — it's built for beginners. Every tool has guided prompts, sensible defaults, and a preview before you export. Most new users create and export their first book within 10 minutes of signing up.

The platform works in any modern browser, including mobile. However, for the best experience — especially when reviewing multi-page PDF previews — we recommend a desktop or tablet.

Librava uses a combination of algorithmic puzzle solvers (for logic-based puzzles like Sudoku and Crosswords, which require provably unique solutions) and large language models (for vocabulary, clues, themes, and creative content). Every generated puzzle is validated before export.

Yes. For all logic puzzles — Sudoku, Kakuro, Numberlink, Bridges, Worduko, Drop Quote — every generated puzzle is algorithmically verified to have exactly one solution before it is exported. We never include ambiguous puzzles.

Yes. Every puzzle and worksheet tool accepts custom input. You can paste your own word lists, specify topics or vocabulary, or enter a niche theme. You can also choose from hundreds of built-in themed word lists.

Yes. For educational tools, you can set a grade level from Kindergarten through Grade 12. Librava adjusts vocabulary, sentence complexity, and problem difficulty to match the specified level.

No. Your prompts and generated content are processed in-session for generation purposes only and are not used to train AI models — ours or any third party's. See our Privacy Policy for full details.

Amazon KDP (Kindle Direct Publishing) lets anyone publish and sell physical and digital books on Amazon with no upfront costs. Librava exports files formatted precisely for KDP — correct trim sizes, bleed settings, and 300 DPI resolution — so you can upload directly with no editing.

We support all common KDP trim sizes including 6×9 inch, 8×10 inch, 8.5×11 inch, and 5.5×8.5 inch. You select the trim size before export and the entire layout reflows automatically.

Yes. All puzzle exports include a complete answer key section. You can choose to include it at the back of the book or export it as a separate PDF. Solution pages are clearly labelled and formatted to match the puzzle pages.

Yes. The Cover Maker generates KDP-compliant full covers (front + spine + back) based on your page count and trim size. The Interior Designer helps you lay out structured interiors with custom headers, page numbers, and branding.

No. Librava generates the files; the KDP account is yours. We never connect to or manage your KDP account. You simply download the PDF and upload it to KDP yourself.

Yes. You retain full commercial rights to everything you generate. You can sell on Amazon KDP, Teachers Pay Teachers, Etsy, Gumroad, or your own website. There are no royalty fees or revenue sharing — all revenue is yours.

It varies widely. Many publishers earn $100–$500/month from a small catalogue; active publishers with 50–100+ listings can earn $2,000–$5,000/month. KDP puzzle books and educational worksheets are consistently among the highest-selling low-content book niches.

Amazon KDP is best for physical and digital puzzle books (royalties of 35–70% on digital). Teachers Pay Teachers and Etsy are best for individual worksheets and PDF packs. Most successful sellers use at least two platforms in parallel.

Most sellers see consistent income after publishing 20–40 listings. Niche focus matters more than volume — a tightly themed catalogue (e.g. 'Grade 3 Maths Worksheets' or 'Large-Print Sudoku for Seniors') converts better than random content.

Our tools include built-in theme libraries curated around high-demand KDP niches. We also publish guides and examples in our blog covering profitable niches across puzzle books, activity books, and educational workbooks.

You can create as many puzzles as you want per book. Each puzzle in a book is unique — no two grids are the same.

Yes, you can combine multiple puzzles or content into a single project. this way you create unique interiors

Easy, Medium, and Hard for most puzzle types. Sudoku and Kakuro also offer an Expert level. For educational worksheets, difficulty is controlled by grade level and you can further customise problem count and complexity.

Yes. Each word search uses a seeded randomisation algorithm to place words in all 8 directions and fill remaining cells. Even two books with the same theme will produce different grids — no two exports are alike.

Yes. Large-print mode increases grid cell size and font size to meet large-print standards. This is popular for senior activity books, which are a strong niche on Amazon KDP.

Yes. The free plan lets you generate and preview content with any tool. Exports on the free plan include a Librava watermark and are limited to 5 exports per month. No credit card is required to sign up.

Yes. Cancel any time from your account settings. Your plan remains active until the end of your current billing period — we don't offer pro-rated refunds for mid-cycle cancellations, but you'll never be charged after cancelling.

We encourage all users to take full advantage of the trial period to determine if our service fits your needs. Refund requests are reviewed individually and are only possible if the service was not utilized after the trial period. Please note that once your trial is over or your subscription becomes active, no refunds can be offered.

Yes. We offer a 20% education discount for verified teachers and institutional licences for schools and districts. Email education@librava.ai with your school email address to apply.

Yes. All data is encrypted in transit (TLS 1.3) and at rest (AES-256). We never sell your data and only share it with the third-party providers listed in our Privacy Policy.

Yes. You can delete your account from Settings at any time. All personal data and generated content is permanently deleted within 30 days. Anonymised usage data may be retained for analytics.

Yes. We comply with GDPR (EU/UK) and CCPA (California). You can exercise your data rights — access, deletion, portability, and objection — by emailing privacy@librava.ai.