Privacy Policy

NumberChan has no user accounts, sign-up, or registration. You do not need to provide your name, email address, or other personal information to use the calculators.

NumberChan’s calculator math and tool search run in your browser. Calculation inputs, results, and tool-search queries are not submitted by NumberChan’s calculator or search features to an external server.

As you use a calculator, NumberChan automatically keeps the tool, entered values, result, and date in your browser’s local storage as Recent Calculations (up to 50 entries; older ones are removed). When you tap Save result, the same details are kept separately as Saved Results (up to 100 entries). Restoring an entry uses temporary browser session storage.

These records are not synchronized between devices or browsers. Other people who use the same browser profile may be able to see them, so avoid saving sensitive figures on a shared device.

Website visit analytics are enabled through Lovable. They provide traffic reports such as visits, page views, referring sources, and device or geographic summaries. These reports are separate from your locally calculated figures.

NumberChan includes Google AdSense code. Google and its partners may use cookies or similar technologies to serve, personalize, and measure ads based on visits to this or other websites, and may process technical information such as IP addresses and device details, subject to applicable settings and consent requirements. Ad code can make requests even when an ad is not displayed. See Cookies & Advertising.

Read how Google uses information from partner sites and manage preferences in Google My Ad Center.

Google-hosted fonts make requests to Google services, which may receive ordinary technical request information such as your IP address and browser details. Following an external link takes you to a service with its own privacy practices.

Opening a page sends ordinary web requests to the hosting service, which may process technical information such as IP address, browser type, and requested pages to deliver and secure the website. On-device math does not mean that visiting a website creates no network activity.

You can select individual entries to delete or use Clear all in Recent Calculations or Saved Results, or clear this site’s browser storage. Browser settings can also restrict cookies and third-party requests. Clearing storage removes your saved calculations; restricting third-party requests may affect advertising or fonts.

Depending on where you live, privacy laws may give you rights regarding personal information and may require consent before certain non-essential cookies or similar technologies are used. Where such consent is legally required, it must be obtained through an appropriate consent mechanism.

NumberChan does not hold calculator inputs or saved results on its own servers; that information is controlled through your browser. For information processed by Google for advertising, use Google’s preference tools linked above. NumberChan does not offer individual correspondence, and this notice does not replace any legally required consent controls.

NumberChan can be visited from many countries. Hosting, analytics, and advertising providers may process technical information in countries other than your own, under their own terms and safeguards.

This policy may be updated when website features, service providers, or legal requirements change. The latest version and its date will be published on this page.