What the game does
Numbered tiles drift across a four-by-four grid. You swipe or press arrow keys to slide them, and matching numbers merge into their sum. The game tracks your current score and your highest-ever score.
What's stored, and where
Your best score is saved in your browser's local storage under a single key, so it persists between visits on the same device. It is read and written entirely within your browser and is never transmitted to any server.
- Your personal best score, stored only in your browser's local storage
- Ordinary web server access logs (timestamp, browser type) used to keep the page reliable and secure
What we deliberately avoid
No accounts, no names, no contact information, no location tracking. NumberDrift doesn't include leaderboards that would require knowing who's playing, and we haven't connected any advertising or analytics network.
Cookies
NumberDrift does not use cookies. The local storage entry behaves differently — it stays on your device and is never automatically sent to a server. You can clear it any time through your browser's settings.
Server logs
As with most websites, our hosting infrastructure keeps brief, routine access logs to maintain security and catch abuse. These aren't used to build any profile of individual visitors and are retained only briefly.
Sharing
We have no arrangements to share data with advertisers, data brokers, or other third parties — there's essentially nothing personal generated by playing NumberDrift to share in the first place.
Your control
You can erase your saved best score at any time by clearing this page's site data through your browser settings. Doing so resets the number back to zero and nothing else changes.
Updates
If NumberDrift's data practices ever change, this notice will be revised to describe exactly what's different.
Reflects the current build of NumberDrift