Privacy Policy

The short version

Kiku doesn't collect or store your data. There are no accounts, no tracking cookies, and no analytics. Game data lives in server memory while you play and is gone when the lobby closes.

What stays on your device

Kiku uses your browser's localStorage to remember your preferences between sessions:

• Player name and color
• Starting life preference
• Saved deck lists

This data never leaves your browser. You can clear it anytime through your browser settings.

During gameplay

While you're in a game, your player name, card positions, life total, and other game actions are shared with other players in your lobby through a real-time connection. This data exists only in server memory and is deleted when the lobby closes. Nothing is saved to disk.

Player stats

Kiku displays anonymous player counts (players today, this week, all time) on the landing page. To count unique players without tracking you:

• Your IP address is hashed with a one-way cryptographic function (SHA-256) and a secret salt
• Only the hash is stored — your actual IP address is never saved
• The hash cannot be reversed to reveal your IP or location

This lets me count unique visitors without knowing who or where you are.

Feedback

If you choose to submit feedback through the app, your message, feedback type, and player name are saved to disk on the server. This is the only user-provided data that Kiku persists.

Third-party services

Card data and images are fetched from Scryfall. These are publicly available images cached on the server to improve load times. No user data is sent to Scryfall.

Changes

If this policy changes, I'll update the date at the top of this page.

Contact

Questions? Use the feedback button in the app or reach out via Ko-fi.