SITE PRIVACY
Privacy, in plain language.
What this website does with the information needed to serve a page.
Using the guides and tools
The calculators run in your browser. The site code does not send the numbers you enter to a calculation server, save them in a profile, or require an account. The library search also filters the already-loaded page locally. Reloading or leaving a tool normally clears its current inputs.
Requests still reach the hosting service
When you request a page or asset, the hosting server and Cloudflare process network information such as IP address, requested path, time, browser headers and response status. The origin uses access and error logs to operate and troubleshoot the website. These request records are distinct from calculator inputs and should not be interpreted as verified individual readers.
Analytics and cookies
This release does not embed a Google Analytics tag, advertising pixel, visitor profile or site-set tracking cookie. Fonts are hosted with the website. Cloudflare may apply its own operational or security processing when serving requests. We do not claim that a page request is anonymous to network infrastructure.
External destinations
APK, RS9, source, email and Telegram links lead outside this publication. The destination’s policies apply when you follow a link or send a message. A downloaded application can have its own data practices; this page does not describe or certify them.
Contacting us
If you email the shared contact, the email system receives the content and sender information you choose to send. Please avoid sensitive account or payment information. For a question about this site’s handling of information, email rs9support@email.com with the site name in the subject.
This notice describes the current release, reviewed on 5 September 2026. If the site later adds an analytics collector, account system or form, the notice should be updated before that feature is introduced.