Privacy Policy
Numlu is designed to keep everyday calculator use simple, transparent, and local to your browser whenever possible.
Scope of this Privacy Policy
This Privacy Policy explains how Numlu handles information when you use the website, calculators, category pages, About page, FAQ, feedback form, and related resources.
Who operates Numlu
Numlu is an independent browser-based calculator suite created and operated by Sergei Solod. Numlu is built for practical everyday estimates without accounts, dashboards, or hidden calculation workflows.
Calculator inputs
Calculator inputs are processed in your browser during the normal calculation flow. Numlu does not require an account, does not provide a database-backed saved-results feature, and does not intentionally store your calculator inputs or results on a backend server as part of ordinary calculator use.
Local browser state
Numlu may store limited local state on your device to make the site easier to use, such as language preference, calculator settings, recent choices, consent preferences, or other browser-side preferences. This local state may use technologies such as localStorage, sessionStorage, or similar browser storage. You can usually clear this data through your browser settings.
No account wall
Numlu does not require user registration for the core calculator experience. Because there are no user accounts for ordinary calculator use, Numlu does not maintain account profiles, account dashboards, or account-based calculation history for normal visitors.
Feedback form
If you send feedback, bug reports, calculator ideas, content corrections, or other messages through the feedback form, Numlu may receive the text you submit and lightweight page context needed to understand the issue, such as the relevant page or calculator. You should not include sensitive personal, financial, medical, legal, password, tax, identity, or private household information in feedback messages.
Hosting, logs, and analytics
A deployed version of Numlu may use standard hosting providers, server logs, security tools, and privacy-conscious analytics to understand site reliability, traffic patterns, page performance, feature demand, errors, and aggregate usage. These systems may process technical information such as page URL, referrer, browser type, device type, approximate region, timestamps, cookies, or similar identifiers. Numlu does not intend to send calculator inputs or calculation results as custom analytics events.
Cookies and similar technologies
Numlu may use cookies or similar technologies for essential site functionality, local preferences, consent choices, analytics, security, and reliability. Where applicable law requires consent for non-essential analytics or similar technologies, those technologies should be enabled only after the required consent has been obtained.
Third-party services
Numlu may rely on third-party services for hosting, infrastructure, delivery, analytics, security, forms, or similar operational needs. These providers may process limited technical or usage-related data to operate, protect, and improve the website. If Numlu links to another website or resource, that external service is governed by its own privacy practices.
Sensitive inputs
Numlu calculators are intended for practical estimates, not for collecting sensitive records. You should avoid entering information that you would not want processed in your browser environment, visible on your screen, stored in local browser state, included in screenshots, or exposed through browser extensions, shared devices, workplace monitoring, or similar local risks.
Retention
Numlu does not intentionally retain calculator inputs or results on its servers as part of the normal browser-only calculation flow. Local data stored in your browser remains on your device until you delete it, your browser removes it, or the relevant storage is cleared or expires. Hosting logs, analytics records, and feedback messages may be retained for as long as reasonably needed for site operation, security, support, analysis, and legal compliance.
Your privacy rights
Depending on where you live, you may have rights to request access, correction, deletion, restriction, objection, portability, withdrawal of consent, or additional information about personal data processed by Numlu. Because ordinary calculator inputs are designed to stay in your browser, Numlu may not be able to retrieve or reproduce calculator data that never left your device.
Security
Numlu reduces privacy risk by keeping the ordinary calculator flow browser-first and avoiding account-based calculation storage. However, no website, browser, device, local storage system, extension environment, hosting provider, or internet transmission can be guaranteed to be completely secure.
Changes to this Privacy Policy
Numlu may update this Privacy Policy from time to time to reflect legal, technical, operational, or product changes. The latest version will be published on this page.