Open Signal Maps.

The Open Signal Maps designed for Androids monitors the signal strength in a network. The application shows the direction and the location of the tower the phone is connected to and also displays the strength of the signal that it is receiving. Network speed can also be easily determined by self run tests on the application.

  

 Users can share the data the app gathers with the OpenSignalMaps website, where the information is processed and visualized on a map.

The website allows users to drill down into the data by network and network type, allowing them to find which network has the best coverage  and  comparisons of download speeds   in any location.

web site  : http://opensignal.com/   
 Download Open Signal Maps          

ArcGIS for Smartphones and Tablets

Map Navigation, Data Collection/Reporting, and GIS Analysis from Your iOS, Windows Phone, or Android Device

ArcGIS apps for smartphones extend the reach of your GIS to a wider audience. These are free applications that you can download from the Apple® App Store , Windows® Marketplace, or Android™ Market. All three apps include a developer-focused SDK that you can leverage to build your own custom applications.

• Find and share maps from ArcGIS  Online.
• Use tools to search, identify, measure, and query.
• Collect and update GIS features and attributes.
• Perform GIS analysis by accessing geoprocessing tasks

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