Privacy Policy

What the health check reads

The health check uses standard browser APIs to check your computer. All of this is processed in your browser only. None of it is transmitted.

Browser name and version Detected from navigator.userAgent. Tells you which browser you are using.
CPU cores From navigator.hardwareConcurrency. The number of logical processor cores available.
Approximate RAM From navigator.deviceMemory. Not available in Firefox, shown as Unavailable there.
Screen resolution From screen.width, screen.height, and screen.colorDepth.
GPU name From the WebGL renderer string. Shows your graphics card name.
Browser feature support Whether your browser supports WebRTC, WebGL, and WebGL2. Yes or no checks only.
Browser language From navigator.language. For example: en-GB or en-US.
Touchscreen From navigator.maxTouchPoints. Detects whether your device has a touchscreen.
Operating system From navigator.userAgentData. Platform name and version where supported.
Cookies and storage Whether your browser has cookies and local storage enabled. No data is read from them.
Battery Level and charging state from navigator.getBattery(). Not available in Firefox or Safari.
Network connection type Wi-Fi, Ethernet, or cellular, from the Network Information API where supported.
Permission states Whether you have granted or blocked access to your camera, microphone, location, notifications, and clipboard. The health check reads the current state only. It does not request access to any of them.

The speed test

The speed test measures two things: how long your browser takes to connect to Cloudflare's servers (ping), and how fast it can download 500 kilobytes from speed.cloudflare.com.

Cloudflare's servers log your IP address as part of this request, the same way any website you visit logs connection information. CalmPC does not receive, store, or see any part of this exchange. Your speed result is calculated in your browser and stays there.

What stays on your device

CalmPC saves four small items in your browser's local storage. This data never leaves your device. It is not transmitted, synced, or backed up anywhere.

pc-helper-history Which guides you have opened or marked as done, so your progress is remembered between visits.

pc-helper-recent Your recently viewed guides, so they appear at the top of the guide list.

pc-helper-os-pref Which operating system section you last opened on the Fix an Issue page.

pchelper-theme Your dark or light mode preference.

You can clear all of this at any time by clearing site data for this domain in your browser settings.

Third-party services

Three external services are involved in loading and running CalmPC. None of them receive your health check results.

Google Fonts Loads the Nunito font from fonts.googleapis.com and fonts.gstatic.com. Google may log this request, which includes your IP address. No personal data or health check results are passed.

Cloudflare Used for the speed test (speed.cloudflare.com and cloudflare.com). Described in the speed test section above.

unpkg CDN Loads the animation library used for guide icons (unpkg.com). The CDN may log this request, including your IP address. No personal data is passed.

No analytics, no ads. CalmPC does not use Google Analytics, Plausible, Fathom, or any other analytics service. There are no advertising networks or tracking pixels anywhere on this site.

The shareable report

When you click Share Report, CalmPC encodes your health check results as text directly in the URL, after the # character. This data is never sent to a server. The URL is processed entirely in your browser, and on the browser of whoever opens the link.

The # portion of a URL is not sent to web servers by design. No server ever sees your report data.

The service worker

CalmPC registers a service worker so the app loads offline after your first visit. The service worker caches the app's HTML, CSS, JavaScript, and image files on your device.

It does not read, store, or transmit any of your health check results or any personal information. You can unregister it at any time in your browser's developer tools under Application, Service workers.

Cookies

CalmPC does not set cookies. Your browser may store cookies from the three CDNs listed above as part of their normal operation, but CalmPC does not read or set any cookies itself.

Changes to this page

If something about how CalmPC works changes in a way that affects this policy, this page will be updated and the date at the top will change. The fix guides, health check logic, and third-party services listed above are the main things that could change.

Questions

CalmPC is a free tool with no support team. If something on this page seems inaccurate, the source code is the authoritative reference for exactly what the health check reads and what happens to that data.