The Blessing. Fragmentation allows users to take their pick from thousands of devices. You can choose from phones with 3D screens, projectors, CDMA, GSM, or even CDMA & GSM. You may not care that Tag Heuer has made an Android phone but at least one person does (and they use OpenSignalMaps). It's a triumph for Android that as a single OS it can target so many markets.

The Curse. The proliferation of devices with their associated screen sizes, internal hardware and custom ROMs creates some difficulties. We spend a lot of time making the app presentable (or at less functional) on exotic devices - this is the most common request we get from app users.

The Study. Over the past 6 months we've been logging the new devices that download OpenSignalMaps, we've based this study on 681,900 of these devices. We've looked at model, brand, API level (i.e. the version of Android) and screen size and we've tried to present this in the clearest form we can.

Clay Shirky