Privacy Policy
Last updated: August 25, 2025
We respect your privacy. This page explains what we collect, why we collect it, and how we safeguard your data.
Information We Collect
- Email & first name — if you subscribe to our newsletter.
- Anonymous usage metrics — basic statistics that help improve the app (no personal profiles).
- License data — for SmithLocker (tier, activation, expiry; device info where needed to prevent abuse).
How We Use Information
- Send tips, updates, and puzzle content you opted in for.
- Operate and improve Rainbow Sudoku features and performance.
- Administer licensing and prevent fraud/abuse.
Sharing
We do not sell your data. We may share minimal information with service providers strictly to run Rainbow Sudoku (e.g., email delivery, licensing). They must handle data under similar protections.
Your Choices
- You can unsubscribe from emails anytime via the link in any message.
- You can request deletion of your email from our mailing list.
Data Security
We use industry‑standard safeguards. No method is perfect, but we strive to protect your data from unauthorized access.