Last updated: 5 October 2026.
Game progress
SizeGuess stores completed results, resumable daily rounds, personal statistics and your unit preference in your browser’s local storage. Guesses are calculated locally and are not sent to a SizeGuess results server. This release has no accounts, public leaderboard, advertising scripts or analytics trackers.
You can remove this information with “Clear this browser’s progress” in Your stats, or through your browser’s site-data settings. The app also caches its core pages and assets for offline use with a service worker. Unregistering the service worker and clearing site data removes that cache.
Sharing
A shared game link contains a puzzle seed, category and version. Result text contains the score and round colours. A shared comparison can contain the selected object identifiers and an entered height. Share only information you want the recipient to see.
Contact form
The contact page uses FormSubmit to forward your name, email, message and selected topic to the site operator. You choose to submit these details; they are used to respond to your request or investigate a correction. Do not include sensitive personal information. FormSubmit and its anti-spam service process submissions according to their own policies.
Hosting and external links
Cloudflare hosts the website and may process technical request information such as IP addresses and browser details to deliver and protect the site. Measurement-source links take you to independent websites with their own privacy practices.
Future changes
If advertising, analytics or accounts are introduced, this policy must be updated and the applicable choices provided before those features run. They are not enabled merely by visiting this release.
Questions
Use the contact page for a privacy question or a request concerning a previous contact message.