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Privacy policy

Your data stays on your device.

Grade Commander is a Chrome extension that helps Hsinchu County American School students understand their PowerSchool grades. This page explains exactly what data we touch and what we don't.

LAST UPDATED · MAY 2026

The short version

What data the extension reads

When you open Grade Commander while on the hcas.powerschool.com tab, the extension reads the following data from your existing PowerSchool session:

• Course names and section IDs
• Assignment names, due dates, point values, and your scores
• Category names (Formative, Summative, Homework, etc.)
• Your reported overall grade per course

This data is read using the same authenticated session you already have with PowerSchool — the extension does not receive, store, or have access to your password.

Where the data goes

Nowhere. All processing happens locally inside your browser. We do not run any backend server. Specifically:

• No data is sent to any external server, including ours — we don't operate any.
• No analytics, telemetry, or tracking pixels are used.
• No third-party SDKs or services are integrated.
• The only network requests the extension makes are to hcas.powerschool.com, the same domain you're already logged into.

Local storage

Grade Commander uses chrome.storage.local to remember your personal preferences across popup sessions:

• Your target GPA
• Category weights you've configured per course
• Credit overrides per course
• Your chosen theme (Ledger, Midnight, or Daylight)
• Your selected term view (semester or full year)

This data lives in your Chrome profile on your device. You can wipe it any time by removing the extension or clearing your browser data.

Permissions explained

Chrome's permission warnings can sound scary. Here's what each one Grade Commander requests is actually used for:

activeTab

Lets the extension read the page you're currently viewing — but only when you click the extension icon, and only that one tab. We use this to confirm you're on PowerSchool before pulling any data.

scripting

Lets us inject the content script that reads grades from PowerSchool's API. This is the script that does the actual work; without it, the extension can't function.

tabs

Used only to check the URL of your active tab so we know whether you're on PowerSchool. We do not enumerate, monitor, or read content from any other tab.

storage

Used to save your preferences locally (target GPA, category weights, theme, etc.) so you don't have to reconfigure them every time you open the popup.

Host permissions: hcas.powerschool.com

The extension only requests access to your school's PowerSchool domain — nothing else. No other websites are accessible to the extension.

What we never do

• We never sell or transfer your data to third parties.
• We never use your data for credit scoring, advertising, or any purpose unrelated to the extension's single function.
• We never collect personal identifiers, passwords, financial info, health info, or location data.
• We never use remote code — every line of JavaScript is bundled inside the extension package and reviewable.

Children's data

Grade Commander is built for high school students, including those under 18. Because no data ever leaves your device and we collect nothing on a server, no information about minors (or anyone else) is ever transmitted to us or to any third party.

Changes to this policy

If this policy ever changes, the updated date at the top of this page will reflect the change. Material changes will also be reflected in the extension's Chrome Web Store listing.

Contact

Questions about this policy? Reach out via the Chrome Web Store listing's support tab, or open an issue on the project page.