The short version
Colorin is a subscription coloring-book tool built around KDP-compatible sizes, priced from $11.99 to $79 a month across four tiers (Hobby, Essential, Pro, Business), each capping batch size, active book count, and how much of the margin tooling is unlocked. Commercial rights are included from the Hobby tier up. CrayonMill has one pricing model — credit packs, no subscription — and no separate cap on how many pages a single book can hold beyond its own 24–300 interior-page window.
| Colorin | CrayonMill | |
|---|---|---|
| Unit of work | One page, batched up to 15 (Hobby/Essential), 25 (Pro), or 50 (Business) per run | One book (24–300 art pages, up to 150 single-sided) |
| Topics | Not described as automatic — batching is a page-count feature, not stated as topic planning | Planned from an audience and a theme, one distinct topic per page |
| Resolution | Not stated on their pricing or homepage | 2550 × 3300 px = 300 DPI, always, documented |
| Line art format | Not stated on their site | 1-bit (no gray pixels), enforced before export |
| Multi-size PDF export on every tier; auto margins unlock at Essential ($15.99/mo, 100-use cap), unlimited at Pro ($39.99/mo) and up | Gutter set automatically by page count (0.375 in / 0.5 in), included on every plan, no tier gate | |
| Failed generations | Not stated on their site | Credits refunded, page marked, one-tap regenerate |
| Photo to coloring page | Yes, listed as photo conversion from Hobby ($11.99/mo) up | No (deliberately) |
| Cover generator | Yes, book covers included per tier (5 on Hobby, up to unlimited on Business) | No — see the cover size guide |
| Online coloring | Not stated on their site as a distinct feature | Planned (tap-to-fill player) |
| Free tier | 8 free pages plus "100+ free designs," no credit card | First 4 pages free, full resolution, no watermark |
| Pricing | 4 subscription tiers, $11.99–$79/month, plus separate credit packs | Credit packs only, no subscription |
From Pressed Botanicals (Adults) · Make one like it
Where Colorin is the better pick
- If you want character-consistency across pages from an uploaded reference image, Colorin's custom character upload covers that in a way CrayonMill does not.
- If you are running many small books at once and want tier-based active-book limits (3 on Hobby, up to unlimited on Business) as a planning guardrail, that structure is built into Colorin's pricing.
Where CrayonMill is the better pick
- If a single book needs more than 15–25 pages, Colorin's per-batch caps push you into a higher subscription tier just to reach it in one run; CrayonMill supports up to 300 art pages per book on any plan.
- If unlimited auto-margins matter, that only fully unlocks at Colorin's $39.99/month Pro tier (Essential's $15.99/month version caps at 100 uses); CrayonMill sets the gutter by page count automatically from the first free page onward, no tier gate.
Sources
Last verified 2026-09-04. Updated 2026-09-04.