Map Cellular Signal Automatically

No. Signal mapping is Android only, because iOS does not give apps access to the cellular telemetry it depends on. iPhone users can still contribute by running speed tests in the CoverageMap app.

No. Signal mapping can run in the background, so it keeps collecting cell telemetry while you use other apps or leave your phone in your pocket. Background mapping is optional, though: you can limit mapping to only when the app is open, or turn it off completely.

Signal mapping is heavily optimized for efficiency. Sampling and uploads are batched and scheduled so continuous mapping has a negligible impact on your battery life.

Yes. Speed testing and signal mapping run alongside each other, so you can start a speed test, or leave recurring tests running, without pausing signal mapping or losing readings. Both sets of results are contributed to the Crowdsourced Map.

Both SIMs are mapped at the same time. One trip produces a complete set of readings for each carrier, so you never have to switch between lines to map them.

Readings are attributed to the network you are actually connected to. If you travel abroad and use an international eSIM, your measurements are correctly credited to that roaming carrier.

No. Signal mapping tracks the combination of your location, carrier, tower, frequency, and network technology, and only maps a location again when one of those values changes. You can also configure the distance used for that check and how often an already-mapped area is rechecked.

Every reading is a snapshot of your cellular connection at one moment in time: when it was captured, where you were, your elevation, and how you were moving, along with the carrier and SIM in use, whether you were roaming, and the network technology and frequency band you were connected to. It also includes the radio measurements themselves, such as signal strength and quality, plus identifiers for the cell serving you and the neighboring cells your phone could see. Basic device and app details, like your phone model and Android version, are recorded so readings can be compared fairly across different hardware. Readings are linked to your account so you get credit for what you contribute, and they appear on the public map without identifying you.

Yes. Exclusion zones let you define areas such as your home or workplace where mapping is turned off automatically, and collection resumes once you leave the zone. This processing is done on device and is never uploaded to our servers.

If you are signed in, deleting your CoverageMap account permanently deletes all of the data you have uploaded. Every signal reading tied to your account is removed from our system for good, not simply hidden or unlinked from your profile.

Not yet. Tower information is already being collected alongside every signal reading, and when tower mapping launches, all of the tower data gathered up to that point will be included.