Privacy Policy — Real Speed Check

Effective date: 2026-09-01 Product: Real Speed Check (Chrome extension) Speed-test service: rsc-api.yaotai.ai

1. Scope

Real Speed Check is a Chrome extension that measures download speed, upload speed, latency and jitter. This policy explains what the extension stores on your device, what leaves your browser when you run a test, and how your IP address is used.

In short: your results, logs and history stay in your browser and are never uploaded. Running a test does send network requests to our speed-test service, which — like any web server — receives your IP address. We use that IP address only to apply per-IP rate limits. There are no accounts, no ads, no analytics and no tracking identifiers.

2. What Real Speed Check measures

A test measures four things: download speed, upload speed, latency (round-trip time) and jitter. It does this by timing ordinary HTTPS requests to the speed-test service:

GET /ping — small requests used to measure latency and jitter
GET /download — the service returns generated data so download speed can be timed
POST /upload — the extension sends randomly generated bytes so upload speed can be timed

The upload payload is randomly generated measurement data. It is never your files, your page content or anything else from your device. The service counts how many bytes arrived and discards them; nothing from the request body is stored.

Real Speed Check reports measurements. It does not diagnose the cause of a slow connection: it does not detect Wi‑Fi quality, network congestion, routing problems, VPN or proxy effects, or ISP throttling.

3. Information stored in your browser

The following is stored locally on your device using Chrome's extension storage (chrome.storage.local):

your test results and the run log for each test
your test history — the most recent 50 manual results, and the most recent 50 peak-hour results
the labels you choose for a test (Fixed place / Temporary, Wi‑Fi / Ethernet)
your interface language
peak-hour settings and the peak-hour log, if you turn that feature on
the country and contract-plan values you type into the carrier reference card

None of this is uploaded to the speed-test service. It is also not synchronised across your devices — the extension uses local storage only, never Chrome Sync.

4. Network requests and your IP address

The extension contacts exactly one server: https://rsc-api.yaotai.ai, which is operated by the developer of Real Speed Check. No third-party service is contacted, and no remote code is loaded.

As with any web request, that service receives your IP address and standard HTTP metadata. Your IP address is used for one purpose: to apply per-IP rate limits, so that a single client cannot exhaust the service for everyone else.

The service does not store your raw IP address in its application state. It keeps rate-limit counters rather than an IP address: for each client it holds only the number of requests and bytes used in the current minute and the current day. Those counters contain no IP address, no browser or device information and no measurement results.

The current limits are 6,000 requests per minute, 1 GiB per minute and 20 GiB per UTC day, per IP address. Exceeding a limit returns an HTTP 429 response and nothing else happens.

Location

Real Speed Check does not request Chrome's geolocation permission and does not access GPS coordinates, Wi‑Fi-based location, your city or any precise device location. It does not look up your country or network operator from your IP address either.

The Chrome Web Store data disclosure for this extension nevertheless includes Location, because that category covers IP addresses, and the speed-test service receives and uses your IP address for the rate limiting described above.

5. Cloudflare infrastructure

The speed-test service runs on Cloudflare. As the infrastructure provider, Cloudflare may process network and request metadata as necessary to deliver, secure and operate that infrastructure, under its own policies.

On our side, request logging is not switched on: Workers Logs / Observability is disabled for this service, its request events are not exported to any log destination, and no log-consuming service is attached to it.

6. What we do not collect

No account, sign-in, or user profile
No name, email address or phone number
No advertising, analytics or telemetry identifier — the extension contains no analytics or crash-reporting code
No cross-site tracking identifiers and no cookies
No browsing history, page content, bookmarks or keystrokes
No GPS or precise device location
No uploaded copy of your results, logs or test history
No payment information — the extension is free and contains no payments or ads

7. Permissions

The extension requests only the permissions it needs to work:

storage — to keep your settings, results and history on your device
sidePanel — to open the extension in Chrome's side panel
alarms — to schedule the optional peak-hour test
notifications — to tell you when a scheduled peak-hour test starts or finishes
access to https://rsc-api.yaotai.ai — the speed-test service, and the only host the extension may contact

The extension has no content scripts and cannot read the pages you visit. Its content security policy restricts network access to that single host.

8. Data retention and deletion

On your device

Results, logs, history and settings remain in Chrome's local extension storage until you remove them. You can clear your history with the Clear button in the history panel, clear the peak-hour log with its own Clear button, and remove everything at once by removing the extension in chrome://extensions. History is also limited by design: only the most recent 50 results are kept in each list, and older entries fall off automatically.

On the speed-test service

No raw IP address is stored. The only per-client data is the rate-limit counters described in section 4; they reset every minute and every UTC day. Measurement results, run logs and history are never sent to the service, so there is nothing of that kind for it to retain or delete.

9. International processing

The speed-test service is delivered from Cloudflare's global network, and your test is normally served by a location near you. This means your request may be processed in a country other than the one you are in.

10. Children's privacy

Real Speed Check is not directed to children under 13 and does not knowingly collect personal information from children.

11. Changes to this policy

This policy may be updated as the product changes. The effective date at the top of this page reflects the current version. Material changes will be described in the updated policy itself.

12. Contact

If you have questions about this Privacy Policy or about the data described here, you can reach the developer through:

the developer contact details on the Real Speed Check Chrome Web Store listing, or
X / Twitter: @atkinsssc