Data Protection & Regulatory Compliance

Privacy Policy & Data Ethics

Effective Date: October 23, 2026 • Universal Zero-Telemetry Standard

Executive Privacy Commitment

Study4Class Pro (recognized as study4class, study 4 class, or study for class, powered by the calcsolver and solvecalc engines) operates on a strict zero-telemetry, client-side first architecture. When you calculate algebraic expressions with our scientific calculator, compute cumulative grades with the GPA calculator, run study sessions with the Pomodoro timer, or analyze essays with the word counter, 100% of the computation executes in your device browser’s local memory. We collect zero personally identifiable information (PII), mandate no user accounts, log no homework submissions, and employ no cross-site tracking cookies.

1. 100% Client-Side Isolated Computing Architecture

Traditional educational web applications transmit user keystrokes, calculation queries, and essay texts to remote server backends for processing and database storage. In contrast, Study4Class Pro utilizes modern JavaScript client-side runtime APIs to execute every mathematical and textual routine locally on your device:

  • Scientific Calculator: Evaluates arithmetic, trigonometric, and logarithmic expressions inside browser memory via an isolated Abstract Syntax Tree (AST). No calculations leave your local tab.
  • GPA Calculator: Your course titles, credit weights, and letter grades remain strictly inside local browser memory.
  • Pomodoro Focus Timer: Timer intervals, countdown states, and session counters are managed entirely via browser native Web Audio and JavaScript timers.
  • Academic Word Counter: Your submitted thesis statements, essays, and text snippets are processed character-by-character on your CPU; no textual data is ever transmitted across the network.
  • Cornell Notes & Scratchpad: Stored strictly in your browser's local sandbox; never synced to any cloud database.

2. Categories of Information We Never Collect

To guarantee student confidentiality and institutional trust, Study4Class Pro maintains a strict data minimization policy:

No Student Identities
No names, email addresses, phone numbers, student IDs, or social media logins are requested or stored.
No Payment Data
Study4Class Pro is 100% free; we never ask for or store credit cards, billing addresses, or bank details.
No Coursework Storage
Calculations, draft essays, notes, and homework inputs are never sent to remote servers or AI model training pipelines.
No Ad-Tracking Pixels
We do not use surveillance marketing pixels, third-party behavioral trackers, or cross-site profiling cookies.

3. Transparent LocalStorage Audit

We use your browser’s native localStorage API solely to preserve your non-identifying user interface preferences locally on your specific device. Below is an exhaustive audit of every key our code utilizes:

Storage Key Purpose Lifespan Transmitted to Server?
study4class-theme Stores UI mode preference ('dark' or 'light'). Persistent on device No (0% transmission)
study4class-notes Stores scratchpad notes typed by the student for revision. Until student clears No (0% transmission)
study4class-pinned Stores IDs of favorite tools pinned to top of tools shelf. Persistent on device No (0% transmission)
study4class-cloak Stores custom tab title & icon disguise choice. Until student resets No (0% transmission)

Students can purge all stored preferences at any time by clearing browser cookies and site data for study4class.pro.

4. Educational & Global Privacy Standards Compliance

FERPA (Family Educational Rights and Privacy Act)

Because Study4Class Pro never receives, maintains, or transmits student education records or personally identifiable student submissions, our platform complies with FERPA requirements for use in K-12 school districts and post-secondary colleges.

COPPA (Children’s Online Privacy Protection Act)

Our platform does not knowingly collect personal information from children under the age of 13. Since no sign-up or data capture exists, younger learners can safely use our scientific calculator and homework tools without requiring parental consent forms.

GDPR & UK-GDPR (Data Minimization by Design)

In accordance with Article 5(1)(c) of the General Data Protection Regulation (data minimization), Study4Class Pro processes zero personal data. We require no intrusive cookie consent popups because we do not employ non-essential tracking cookies.

CCPA & CPRA (California Consumer Privacy Act)

We do not sell, rent, monetize, or share personal consumer information with third parties. Users have total sovereign control over their client-side browser cache.

5. Data Protection Officer & Inquiries

If you are a school district compliance officer, parent, or educator with questions about our data architecture, or wish to review our security posture, please contact:

Study4Class Pro Compliance Desk
Email: privacy@study4class.pro
Physical: 101 Main Street, Suite 450, Cambridge, MA 02142, USA