Want to know just how strong your cellphone signal is? Now there’s a map and an app for that.

OpenSignalMaps uses our Android smartphones as probes, crowdsourcing locations of cellular towers and their strength. See the 'black spots' that will kill your call, and where reception will be best.

Developed by Staircase 3, the company plans to create accurate signal maps with its Android app and OpenSignalMaps website. The company says the beta version of its Android app OpenSignalMaps has been downloaded more than 80,000 times, as you can see by its maps, the crowd of Android users (mainly in the U.S.) has already contributed millions of signal strength readings.


Download the app using the QR code above, or by searching the Market for OpenSignal.

Take a look at the images below and you’ll see how OpenSingleMaps, a Google Maps mashup, shows its data two different ways: pinpointing cell towers and then showing a heat map of cell coverage.
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