Privacy Policy

Last updated: September 2026

What we collect

When you sign in with GitHub or email, we receive your email address and GitHub user ID. The coloring-page descriptions you enter and the generated line art images are stored in our database to power your history and to help us improve AI prompt templates in the future.

How we use it

• Authentication: identify you and prevent abuse of paid features
• History: let you retrieve previous line arts on any device
• Quota enforcement: control daily generation limits by plan
• Improvement: anonymized aggregated data helps us refine prompt templates

What we do NOT do

• We never sell your email address to third parties
• We never send marketing emails without your consent
• We never make your generations visible to other users

Data deletion

Want us to delete all of your data? Email xingfang.wang@gmail.com— we'll process your request within 72 hours.