kdp · compare · univers studio
A Univers Studio alternative for puzzle books
Univers Studio is a large web suite for KDP and printables. Its puzzle generators run in your browser at no charge and give you one page at a time; finished books in one click need its Studio plan at $49.99 a month. vøiddo does one thing: it makes the finished files of a KDP puzzle book, interior and full wrap cover with the spine sized to the page count, and checks both against KDP’s paperback specs. You pay per book, from $3.30, and nothing renews.
| vøiddo | Univers Studio | |
|---|---|---|
| How you pay | One-time book credits: $15 for 3 books, $39 for 10, $99 for 30. Credits never expire and nothing renews. | Puzzle generators in the browser at no charge. Plans billed monthly or yearly: Creator $9.99, Pro $24.99 and Studio $49.99 a month, 20% less by the year. One-time packs of 20 credits for $4.99 and 100 for $19.99. |
| What you get | The finished book: interior PDF with every solution, full wrap cover with the spine sized to your page count, a signed check of both files, listing text with seven keyword ideas, six preview images. Ready in 3 to 20 seconds. | Single pages: “All exports are 300 DPI PNG files sized for the selected page format (US Letter or A4).” You assemble the book in a layout tool. Their one-click Book Builder (interior, solutions and cover) needs the Studio plan. |
| Selling the books | Yes, under your own name or imprint, from the first book. | Their License: content made on the free plan “is licensed for personal, non-commercial use only”, and their Terms call the License legally binding; “Commercial use (KDP)” comes with the Creator plan and up. Their puzzle pages say the opposite (“yours to use commercially”), so ask them before selling free plan pages. |
| Puzzle types | 12: sudoku, killer sudoku, calcudoku, futoshiki, nonograms, word search, mazes, cryptograms, word scrambles, number search, kakuro and fill in, alone or 2 to 12 kinds in one variety book. | 8 puzzle generators: maze, word search, crossword, sudoku, bingo cards, dot to dot, cryptogram and word scramble, plus math drills and handwriting sheets. Mazes come as rectangles, circles, hearts or stars. |
| Each puzzle checked | By a second, independent program before it is printed: exactly one solution per sudoku, killer sudoku, calcudoku, futoshiki, nonogram, kakuro and fill in, each word or number exactly once, one route per maze, every code decoded back to its quote. | Stated per generator: sudoku with “solution uniqueness verification”, mazes with “exactly one path from start to finish”. Their crossword “may skip some” words; no claim for word search. |
| Page sizes | 6 × 9, 7 × 10, 8 × 10, 8.5 × 11 in and A4, on white, cream or groundwood paper | Generators: US Letter or A4. The Book Builder (Studio plan) adds other KDP trims, hardcover and Kindle. |
| Cover | A full wrap cover PDF, typeset from the book’s own puzzles, spine sized to your page count and paper. No pictures, nothing to disclose. | A cover builder for your own image (or one from their AI image tool), full wrap with the spine from your page count, downloaded as PNG. The Book Builder draws the cover picture with an AI image model. |
| KDP file check | Every book, interior and cover: page size, page count, embedded fonts, text inside the margins and gutter, small text, line weight, blank pages, cover size, spine text and the barcode area, in a signed report. If KDP rejects the files within 30 days, the credits come back. | A preflight for an interior PDF you upload: “Page count, dimensions, bleed, parity, margins, spine width, file size”. There is no cover upload. |
| Large print | An option on every book: 16 pt and larger, grids in Atkinson Hyperlegible | No large print setting on the puzzle generators; a sudoku page can hold a single large grid. |
| Money back | Unused credits within 14 days of purchase; a book’s credits if KDP rejects its files within 30 days | Their Terms: “no refund is due after payment is confirmed”, except yearly Creator or Pro plans within 7 days of subscribing. No refund on monthly plans, credit packs or Studio. |
Univers Studio figures and quotes from their pricing page, their Terms and License, their generator, Book Builder, cover and preflight pages, read on 24 October 2026. Their pages do not all agree on the free plan’s limits; check their site for today’s terms.
Which one fits
- Univers Studio fits when you want single puzzle pages at no charge, kinds we do not make (crosswords, bingo cards, dot to dot, math drills, handwriting sheets), your own word lists, shaped mazes, hardcover or Kindle formats, or a wider suite with AI images, book descriptions and keyword research. Before you sell pages made on its free plan, check its License.
- vøiddo fits when you want finished, checked files for KDP without a subscription: the interior and the full wrap cover in one go, logic puzzles such as killer sudoku, calcudoku, futoshiki, nonograms and kakuro, large print, cream or groundwood paper, a cover with no picture to disclose, and your credits back if KDP rejects the files.
- The two work together: their generators for crosswords and activity pages, our files for the logic puzzle books and the checked KDP cover.
Questions
Univers Studio has tools at no charge. Why pay for vøiddo?
Their generators give you pages; you still lay out the book, add the answers, make the cover and size the spine, and their License limits selling what you make on the free plan. A vøiddo book arrives finished and checked, with the rights to sell it. If you enjoy assembling pages and your plan covers selling, their tools may be all you need.
Is this cheaper than their Book Builder?
Their Book Builder comes with the Studio plan, $49.99 a month or $479.90 a year. Our packs cost $15 for 3 books, $39 for 10 and $99 for 30, bought once. Ten books a month from us cost $39; the Studio plan also brings their other tools, which you may want.
Will KDP accept the files?
Each book passes our check against KDP’s published paperback specs before you can download it. If KDP still rejects the files within 30 days, the book’s credits go back to your key.
Does vøiddo make crosswords?
Not yet: crossword clues need a source we can stand behind, and we have not settled one. Univers Studio has a crossword generator for your own words.
Is vøiddo connected to Univers Studio?
No. Univers Studio’s About page names 4ALLSMILES LLC as its operator; this page compares public prices and features as they were on the date above.
Also compared: Book Bolt · KDP Builder · Self Publishing Titans · Manaka Royalty. Guides: making a sudoku book · why KDP rejects a puzzle book