Privacy, in plain language.
You can play without creating an account or sharing personal details.
Last updated: October 26, 2026
What this game stores
The game uses your browser’s local storage for Classic daily progress, Scale Streak progress and daily scores, recently played practice comparisons, collection best scores, archive replay results, and statistics. It does not upload those records to an application database. Records belong to this browser and device; they do not sync across devices.
Daily records use keys beginning with sizeitup:. If local storage is unavailable, you can still play in the current page, but refreshing may lose your progress. Clear this site’s data in your browser to remove the records.
Google Analytics and cookies
The production site uses Google Analytics 4 to understand visits, popular pages, traffic sources and general device information. Google Analytics can use first-party cookies to distinguish browsers and sessions. It receives page-view and usage information when its tag is enabled.
We do not send your saved guesses, game history or a personal account ID to Analytics. Google signals and advertising personalization are disabled in our tag configuration. Local development and preview domains do not load the Analytics tag.
You can block Analytics with your browser’s privacy controls or the Google Analytics opt-out browser add-on. See how Google uses information from sites that use its services. Blocking Analytics does not prevent you from playing.
Accounts and advertising
The game does not require an account and does not include advertising scripts. Fonts and game artwork are hosted with the site.
Hosting and basic requests
The site is prepared for hosting on Cloudflare. Like other web infrastructure, a hosting provider may process basic request information such as IP addresses, browser information, and access times for delivery and security. See Cloudflare’s privacy policy for its practices. Local previews run on your own machine instead.
Sharing a score
Sharing is optional. The share button uses your device’s share sheet when available, or copies a short result to your clipboard. Only the game date, round score colors, total score, and site link are included — not your estimates or personal information. Nothing is posted automatically.
Links to measurement sources
Source links take you to other websites. Those websites have their own privacy practices. We only load their pages after you choose a link.