Keep the product useful without collecting more than it needs.

Calculator inputs

Core calculator inputs are processed by the application to produce the result shown to you. Current browser-private planning features do not require an account.

Browser-session storage

Some features use your browser’s session storage to carry a FIRE scenario between tools, retain browser-session progress history, or compare saved scenarios during the current session. That data is intended to remain in the browser session unless a future feature clearly says it is being saved elsewhere.

Closing the relevant browser session, clearing site data, or using browser controls can remove this session-scoped information.

Hosting and routine request data

Like most websites, the hosting and infrastructure providers that deliver NumberCalendar may process routine technical request information needed to serve and secure the site, such as IP addresses, request timestamps, user-agent information, and error logs.

Optional Google Analytics

With your permission, NumberCalendar uses Google Analytics 4 to understand visits and which pages people use. Analytics cookies help distinguish visits. Google processes technical information such as browser and device information, page views, and approximate location derived from your connection. Google receives your IP address when your browser connects to its service.

Analytics does not load until you choose Accept analytics. Rejecting analytics does not affect the calculators. You can change your choice through Analytics preferences at the bottom of any page. Rejecting after accepting stops further measurement and removes accessible Google Analytics cookies for this site. It does not erase data already sent.

We do not send calculator inputs, financial amounts, saved plans, URL query parameters, or URL fragments to Analytics. Advertising personalization and Google signals are disabled. Our integration measures page views, without automatic form tracking.

Your analytics preference is stored locally in your browser so we can remember your choice. Learn more in Google’s Privacy Policy. Account-based storage is not required for the current core tool experience.

Sensitive information

Do not enter passwords, bank credentials, Social Security numbers, tax identifiers, or other secrets into calculator fields. The tools are designed for planning amounts and assumptions, not for storing financial-account credentials.

Lottery data

Public historical lottery results are not personal information about NumberCalendar users. If a future account feature allows users to save tickets, spending, or preferences, the treatment of that personal data will be documented separately.

Changes

This page should change when the product’s actual data behavior changes. Privacy policy reviewed: September 21, 2026.