ColorCraft: AI coloring and story books for KDP, $1,632 MRR
ColorCraft turns a written idea into a coloring book, storybook, comic or puzzle book and exports a KDP-ready PDF with a cover wrap. It earns $1,632 in monthly recurring revenue from 85 subscriptions, verified through Stripe. A classic one-input-to-one-sellable-file creator tool, though the KDP low-content market is crowded.