kdpbook.io vs Childbook.ai: an honest comparison
Childbook.ai writes and illustrates children’s books with consistent characters, up to 32 pages on Hobby or 40 on Premium, and can print a softcover for you. kdpbook.io builds the files Amazon KDP asks for: interior PDF, full-wrap cover and Kindle eBook. Childbook.ai’s commercial-use license and watermark-free output come with its $99/month Business plan.
By kdpbook.io editorialPublished
We make kdpbook.io, so we’re not neutral. Everything about Childbook.ai below comes from its public pages as of (linked at the end); prices and features may have changed since.
At a glance
| Criterion | kdpbook.io | Childbook.ai |
|---|---|---|
| Output | Complete interior PDF, laid out page by page | Book PDF (described as print-ready) or a printed softcover to order |
| KDP trim and bleed | Trim, bleed, margins, spine and page limits applied automatically, with a preflight check. Picture-book trims: 8.5 × 8.5, 8.25 × 8.25, 8 × 10, 8.5 × 11, 7.5 × 9.25, 8.25 × 6, 6 × 9 in | Not documented: trim sizes and bleed are not listed |
| Cover | Full-wrap cover PDF sized from trim, paper and final page count | Cover design included; full-wrap sizing (back cover, spine) not documented |
| Kindle eBook | Kindle EPUB (reflowable or fixed layout) + Kindle cover | Not documented |
| Page count | Picture book 24–48 pages; 8 picture-book and illustrated-story types, plus chapter books and novels | Up to 32 pages on Hobby, 40 on Premium |
| Character consistency | Character reference sheets reused on every illustration | Characters defined once (description or photo) and reused on every page |
| Languages | 34 KDP-supported languages | “Any language”, per its feature list |
| Selling rights | Commercial license on every paid plan; free-plan exports carry a preview watermark and are not for sale | Commercial-use license and no watermark on Business ($99/month) |
| Printed copies | Not offered: files are for KDP or another printer | Softcover printing to order; Premium includes $20/month of print credit |
| Pricing | Free: 2,000 credits once, no card. Plans $25–$99/month | $19–$99/month |
Output
- kdpbook.io
- Complete interior PDF, laid out page by page
- Childbook.ai
- Book PDF (described as print-ready) or a printed softcover to order
KDP trim and bleed
- kdpbook.io
- Trim, bleed, margins, spine and page limits applied automatically, with a preflight check. Picture-book trims: 8.5 × 8.5, 8.25 × 8.25, 8 × 10, 8.5 × 11, 7.5 × 9.25, 8.25 × 6, 6 × 9 in
- Childbook.ai
- Not documented: trim sizes and bleed are not listed
Cover
- kdpbook.io
- Full-wrap cover PDF sized from trim, paper and final page count
- Childbook.ai
- Cover design included; full-wrap sizing (back cover, spine) not documented
Kindle eBook
- kdpbook.io
- Kindle EPUB (reflowable or fixed layout) + Kindle cover
- Childbook.ai
- Not documented
Page count
- kdpbook.io
- Picture book 24–48 pages; 8 picture-book and illustrated-story types, plus chapter books and novels
- Childbook.ai
- Up to 32 pages on Hobby, 40 on Premium
Character consistency
- kdpbook.io
- Character reference sheets reused on every illustration
- Childbook.ai
- Characters defined once (description or photo) and reused on every page
Languages
- kdpbook.io
- 34 KDP-supported languages
- Childbook.ai
- “Any language”, per its feature list
Selling rights
- kdpbook.io
- Commercial license on every paid plan; free-plan exports carry a preview watermark and are not for sale
- Childbook.ai
- Commercial-use license and no watermark on Business ($99/month)
Printed copies
- kdpbook.io
- Not offered: files are for KDP or another printer
- Childbook.ai
- Softcover printing to order; Premium includes $20/month of print credit
Pricing
- kdpbook.io
- Free: 2,000 credits once, no card. Plans $25–$99/month
- Childbook.ai
- $19–$99/month
What Childbook.ai is
An AI children’s book creator. You start from an idea, your own story or a ready-made template, describe each character or upload a photo so a real child becomes the hero, and get a story with an illustration on every page and a cover; you can rewrite any sentence or regenerate any illustration. Its Illustrator mode keeps your manuscript’s words unchanged and proposes the scenes to draw. Books can be downloaded as a PDF or ordered as a printed softcover.
Where it shines
- Personalized keepsakes: upload a photo and a real child appears as the hero on every page.
- Printed softcover copies can be ordered from the site; Premium includes a $20 print credit each month.
- An Illustrator mode for authors who already have a manuscript and only need the pictures.
- Stories in “any language”, per its feature list, and ready-made templates to personalize.
Childbook.ai pricing
- Hobby $19/month (20 books, 100 illustration credits, up to 32 pages); Premium $29/month (50 books, 250 illustration credits, up to 40 pages, $20 print credit); Business $99/month (200 book credits, 1,000 illustration credits).
- Yearly billing takes 2 months off; Business is $990 a year.
- Its pricing lists the commercial license and watermark-free output under the Business plan only. Printing and shipping are extra.
- Its terms allow a refund within six months only if the subscription was never used; unused credits aren’t refunded.
As published on September 28, 2026. See the current prices on its website.
Which one should you choose?
Choose Childbook.ai if…
- You want a personalized keepsake starring a real child, printed and shipped to you.
- You already have a manuscript and only need illustrations placed around your words.
- You make books for family and friends rather than for sale.
Choose kdpbook.io if…
- You plan to sell on Amazon KDP and need the interior, a full-wrap cover sized to the page count and a Kindle edition.
- You want commercial rights from the entry paid plan ($25/month).
- You publish more than picture books: coloring and activity books, chapter books, novels, non-fiction.
Questions
Is kdpbook.io a Childbook.ai alternative?
Yes, if you want to publish on Amazon KDP. kdpbook.io builds the interior PDF, the full-wrap cover and a fixed-layout Kindle eBook for picture books; a 32-page picture book is estimated at about 1,624 credits (≈ $16), which fits in the free signup credits (free-plan files carry a preview watermark). For a personalized keepsake printed and shipped to you, Childbook.ai is the better fit.
Can I publish a Childbook.ai book on Amazon KDP?
Its pages describe a print-ready PDF and, on the Business plan, a commercial-use license with watermark-free output, but they don’t list trim sizes, bleed or a full-wrap cover. KDP wants the cover as one PDF with back cover, spine and front cover, sized from the page count, so check both files against KDP’s specs before you upload. KDP also requires you to disclose AI-generated text and images.
Sources · read on September 28, 2026
- Childbook.ai home page and pricing (opens in a new tab)
- Childbook.ai story book generator (opens in a new tab)
- Childbook.ai Illustrator (opens in a new tab)
- Childbook.ai Business plan (opens in a new tab)
- Childbook.ai terms (opens in a new tab)
- KDP Help: Create a Paperback Cover (opens in a new tab)
- KDP Help: Content Guidelines (AI-generated content) (opens in a new tab)
- kdpbook.io pricing
Try it on your own book.
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