Your game data and privacy

Data saved on your device

When browser storage is available, the game saves your current round, completed daily results, Unlimited best score, recent Unlimited pairs, theme choice and game settings (units, number display and human scale) in local storage on this device. It uses the keys scg-progress-v1, scg-theme and scg-settings-v1. When daily statistics are available it also stores a random browser identifier (scg-client-v1) and the dailies already counted (scg-stats-sent-v1). Streamer mode, if you turn it on with ?streamer=1, is remembered only for the current browser session (scg-streamer in session storage). After you dismiss the cookie notice, scg-cookie-notice-v1 remembers that so the notice is not shown again. The game does not send your guesses or scores to a game account or sync them between devices. If storage is blocked, you can still play, but progress may not survive a reload.

Use your browser’s site-data settings to remove these local records. Removing them cannot be undone through this site.

Website delivery

Cloudflare hosts and delivers this site. To serve pages and protect the service, it can process ordinary request information such as your IP address, browser details and the pages requested. Cloudflare may set necessary cookies for security and traffic management. The game itself does not set advertising cookies; the ad network’s cookies are described under Advertising below.

Cloudflare Web Analytics is enabled on the deployed site: its browser beacon measures page visits and performance without using analytics cookies. Google Analytics also measures visits on the production site. Google Analytics may use a first-party _ga cookie and process browser and visit information. On the production site, the game also sends Google Analytics anonymous gameplay events: when a round starts, the round number, its score and score band, whether the guess was too large or too small, a rough time band, the final total, and when you share, open a source or change a setting. It also records when an ad space has been at least half in view for a second, to judge where ads fit. It never sends your exact guesses, and nothing is sent to Cloudflare Web Analytics about your play.

When you finish a daily challenge, the game sends that daily’s number, your five round scores, whether each guess was too large or too small, and the random browser identifier to this site’s own statistics service on Cloudflare. It is used only to count each daily once and to show everyone the anonymous totals: number of players, average, score distribution and how each round was misjudged. Your exact guesses are not sent, and the statistics database does not store IP addresses. Replays and Unlimited rounds are not sent.

This site has no account system or named leaderboard. You can limit analytics cookies through your browser’s privacy settings.

Advertising

On the production site, game and content pages show ads served by Adsterra, an advertising network. There are no ads on the privacy, terms, about, contact and press pages, in streamer mode, or between rounds of the game. When an ad loads, your browser contacts Adsterra’s servers, which receive your IP address, browser and device details and the address of the page. Adsterra and its advertising partners may set or read cookies or similar identifiers to choose and deliver ads, limit how often you see them, count impressions and clicks, and detect fraud. We have excluded adult ads. We do not send your game data to Adsterra; we receive only aggregate reports, such as how many ads were shown.

Adsterra’s privacy policy and cookies policy explain its processing and how to contact it about your data. You can block or delete these cookies in your browser settings; content blockers also stop the ad requests, and the game works the same without them. A short notice at the top of the page tells first-time visitors about these cookies; choosing OK only hides it.

Email and outside links

If you email contact@sizecomparisongame.org, Cloudflare Email Routing forwards your message to the site operator’s Gmail inbox. The sender address and message are used to read and respond to your request. To ask about or request deletion of your correspondence, write to the same address.

Source links in answer details lead to other publishers, which handle visits under their own policies. Sharing happens only when you choose Share score, Challenge a friend or Save image: the game passes score text, a link (a challenge link contains the five comparison identifiers and your total) or an image to your device’s share feature, clipboard or downloads.

Changes

We will update this page if the game’s data handling changes. The review date above shows when this description was last checked against the site.