Privacy Policy
Last Updated: June 25, 2026
TL;DR — We don't track you personally, we don't sell your data, and your calculator inputs never leave your device.
01 —What We Collect
We inherently believe in data minimalism. Since our calculators process all algorithms directly in your browser using JavaScript, we do not monitor, store, or transmit your individual numeric inputs (e.g., your salary, your weight, your age).
We collect high-level, anonymous usage statistics. This consists of recognizing that a specific calculator was used and general traffic metrics (like page views) without associating this data with personal identities (PII).
02 —How We Use Information
The strictly anonymous traffic data we collect is utilized exclusively to maintain the health of the platform and to guide our future development roadmaps. If we notice the "Compound Growth" calculator gaining massive popularity, we know to prioritize investing time into similar financial tools.
We never sell analytical logs to third-party data brokers under any circumstances.
03 —Cookies & Local Storage
CalculiX Pro intentionally minimizes cookie usage. We utilize your browser's native LocalStorage to save non-sensitive UI preferences — such as whether you prefer the "Dark Mode" or "Light Mode" theme, or preserving your active list in the Subscription Tracker.
These preferences live on your device and are never transmitted to our backend databases.
04 —Third-Party Services
To support the ongoing free availability of our platform, we utilize Google AdSense to serve contextual advertisements. We may also use Google Analytics to monitor structural traffic metrics.
These third parties may utilize standard web cookies to deliver optimized advertisements. You can manage or opt-out of personal ad tracking directly through your Google preferences.
05 —Data Security
The absolute best way to secure personal data is to simply never collect it. We do not run a user-account system, meaning there are no passwords to leak. All connections between you and our web servers are securely encrypted using industry-grade HTTPS/TLS protocols.
06 —Contact & Changes
The digital landscape shifts rapidly, and we reserve the right to append or modify this Privacy Policy to reflect those updates. Any fundamental changes will be reflected by the date at the top of this page.
If you have specific concerns regarding privacy architecture, please reach us via the Contact Page.
Comprehensive Privacy Disclosure & Data Architecture
In an era of rampant data brokering and invasive digital tracking, CalculiX Pro was structurally engineered to be a sanctuary of privacy. We recognize that financial calculators inherently deal with some of the most sensitive variables in a user's life—salaries, net worth, debt structures, and biometric health data. Because of the critical nature of this information, we have adopted an aggressive "Zero-Knowledge" architecture whenever mathematically and technically possible.
1. The Mechanics of Client-Side Processing
The vast majority of web applications function by taking your inputs (e.g., typing your weight into a BMI calculator), packaging that data into a POST request, and transmitting it over the public internet to a remote server. The remote server performs the calculation and sends the result back. This legacy method inherently exposes your data to interception, server-log retention, and potential database breaches.
CalculiX Pro bypasses this entirely. By leveraging modern Asynchronous JavaScript (AJAX) and advanced browser APIs, 100% of the mathematical processing occurs locally on your machine's CPU/GPU. When you calculate your Compound Growth over a 30-year period, your principal investment amount never leaves the RAM of your local device. We literally have no technical mechanism to view, record, or monetize your specific financial or biometric inputs.
2. Compliance with Global Frameworks (GDPR & CCPA)
While our zero-knowledge architecture naturally aligns with strict global privacy laws, we formally state our compliance with the General Data Protection Regulation (GDPR) affecting European Union citizens, and the California Consumer Privacy Act (CCPA). Under these frameworks, you have the right to request the deletion of your data. However, because we do not operate user accounts, do not require email registrations, and do not log PII (Personally Identifiable Information), there is effectively no persistent personal data on our servers to delete. Your anonymity is guaranteed by design, not just by policy.
3. Aggregated Traffic Analytics & Ad Networks
To sustain the high-performance servers that deliver our client-side JavaScript payloads to you globally, we utilize aggregated traffic analytics (such as Google Analytics) and contextual advertising (such as Google AdSense). These third-party services operate under their own stringent privacy policies.
Google Analytics provides us with macro-level insights: identifying which geographical regions access our tools most frequently, which calculators are currently trending, and identifying generalized browser compatibility issues. This data is rigorously anonymized. Google AdSense utilizes cookies—small text files stored securely in your browser cache—to serve advertisements that are relevant to your interests. You retain absolute control over these cookies and can purge them at any time via your browser's security settings, or opt-out of personalized ad tracking globally through the Google Ad Settings portal.
4. LocalStorage vs. Cloud Databases
When using tools like our Subscription Tracker, you may notice that your inputted subscriptions remain visible even if you close your browser and return days later. This is not because we saved your data to our cloud. We utilize a web standard called `LocalStorage`, which writes a small, encrypted string directly to your physical hard drive. This ensures a seamless, persistent user experience without compromising our core tenet of serverless privacy. If you clear your browser cache, this LocalStorage data is permanently and irreversibly destroyed.