Your Data Stays With You
Trevly's privacy policy in plain English. What we collect, what we don't, and why every grade you enter stays on your device—never on our servers.
At Trevly, we respect your privacy and keep data collection to the absolute minimum. Every calculation you run—GPA, grades, attendance, study hours—is processed entirely within your browser. None of your inputs ever reach our servers. This policy explains what limited information we do handle and why.
Introduction
Welcome to Trevly ("we," "our," or "us"). We operate this website to provide free, browser-based academic calculator tools designed to help students, educators, and parents make sense of grades, GPA, attendance, and study planning.
This Privacy Policy describes how we handle information when you visit and use our Service. We encourage you to read it in full—it's short, and written to be understood, not skimmed past.
Information We Collect
Non-personal usage data: When you visit the site, we may collect anonymous technical information to keep the Service running well:
- Browser type and version, used for compatibility and display purposes
- Anonymous usage statistics showing which tools are accessed most
- Basic session cookies to remember display preferences (you can disable these in your browser)
Calculator inputs: Any grades, credit hours, attendance figures, or other data you enter into our tools are processed locally in your browser only. This data is never transmitted to or stored on our servers—not even temporarily.
How We Use Information
The limited, anonymous data we collect is used exclusively for the following purposes:
- Maintaining and improving the performance and accuracy of our calculator tools
- Understanding which tools students find most useful so we can develop them further
- Monitoring for security issues and preventing abuse of the Service
- Displaying non-personalized advertisements that help us keep all tools permanently free
We do not sell, rent, or share any user data with third parties for marketing or profiling purposes.
Third-Party Services
We work with a small number of carefully selected third-party services to operate the site. Each serves a specific function:
- Google Analytics: Provides anonymous traffic and usage data so we can improve the tools. You can opt out via the Google Analytics Opt-out Browser Add-on.
- Advertising Networks: Display non-personalized ads that fund continued free access to all tools. No personal profiling is used for ad targeting on our site.
- Cloudflare: Handles security, DDoS protection, and performance optimization at the network level.
Each of these services operates under its own privacy policy. We encourage you to review them if you have specific concerns.
Data Security
We take reasonable technical measures to protect the integrity of the Service and any incidental data that passes through it:
- HTTPS encryption across the entire site for all data in transit
- Client-side processing for all calculator inputs—nothing is sent over the network
- Minimal data collection by design, reducing exposure from the ground up
- Regular security reviews and dependency updates
Because we don't store your calculation inputs, there is nothing on our end that could expose your academic data in the event of a breach.
Children's Privacy
Our tools are built for general audiences and are particularly useful for students at all levels, including those under 13. However, we do not knowingly collect any personal data from children under 13 years of age.
Because all calculator inputs are processed locally and no account registration is required, the Service is inherently low-risk for younger users. If you believe we have inadvertently collected personal information from a child, please contact us at contact@trevly.xyz and we will address it immediately.
Changes to This Policy
We may update this Privacy Policy periodically to reflect changes in our practices or to comply with legal requirements. When material changes are made, we will update the "Last Updated" year at the top of this page.
Continued use of the Service after any changes are posted constitutes your acknowledgment of the updated policy. We recommend reviewing this page occasionally, though we don't expect it to change often.
Contact Us
If you have any questions about this Privacy Policy or how we handle data, we're happy to hear from you. Reach out directly at:
We aim to respond to all privacy-related inquiries promptly.
Privacy by design, not by promise
The most honest privacy policy is one where there's barely anything to write about. That's what we aimed for with Trevly.
Your grades never leave your browser. All calculations happen locally—our servers never see them.
No account is required. We have no name, email, or profile linked to you.
Anonymous analytics only. We see which tools are popular—not who used them.
No data selling. Ever. Your information is not a product here.
We built Trevly to give students clear answers, not to harvest their data. These policies reflect that priority.
Local Processing
Every calculation runs entirely in your browser. The grades, credit hours, and attendance figures you enter are never transmitted to or stored on our servers.
Anonymous Analytics
We collect anonymous, aggregated data on which tools are used. No personal identifiers are attached to this data—we see patterns, not people.
No Data Selling
We do not sell, rent, or share user data with third parties for commercial or marketing purposes. What little we collect stays strictly within the scope described above.
