Cellular usability test
Checking one place, not a route. Put your phone where you want to test, keep it still, and we'll measure for 30 seconds.
You choose the label - your phone can't tell which room it is in, and we never pretend it can.
User-reported. This browser cannot read your SIM or network operator, so nothing is preselected and nothing is detected - please pick the carrier you are testing.
Test details
While a test is running the app sends a tiny request to its own server about every 2 seconds and records how long the reply takes, or whether it fails. Timing depends on your phone and browser, so the app stores the real timestamp of every check instead of assuming a perfect 2-second rhythm.
A slightly larger download runs roughly every 30 seconds to estimate speed. Keeping it rare protects your data plan and battery.
Your location is recorded whenever your phone reports a new position - not on the check rhythm - so the route stays smooth.
Each check becomes a 0–100 usability score from reachability, response time and measured speed. That is turned into the plain rating you see: Great, Good, Fair, Weak, Very Weak or No Connection.
What the app cannot see: signal bars, dBm, RSRP, RSRQ, SINR, band or cell tower details. Browsers don't expose them, and nothing here estimates or claims them. It also never touches contacts, messages, camera or microphone, and it cannot tell whether you are on a phone call - pauses are simply recorded as app interruptions.