Cookies & Storage

Last updated: 2026-02-21

Change by One uses limited on-device storage to make the game work smoothly.

What we store on your device

Theme preference (so your chosen colors persist).
In-progress daily game state (so a refresh doesn’t wipe your progress).
My Stats (your history view) is derived from this local game state and is local-only.

Cookies

We currently do not rely on non-essential cookies for advertising. If we add analytics or marketing cookies in the future, we’ll provide a consent choice where required.

Note: even without cookies, we may use localStorage for essential functionality.

How to clear it

You can remove on-device storage by clearing site data in your browser settings. This will reset your theme and in-progress game state.