Standard compass

Google play today with a lot of free compass app. However, when using the results often do not give good results because people write applications typically focused on only part of the interface. As an expert in criminal science and years of experience in the scene examination. I notice the mechanical compass is often the most accurate results.
With the desire to create a compass for the best result I wrote Compass application with parameters calibrated to match with a variety of sensors on different phone lines so that results similar to la most mechanical table.
Use and compare the results. This is a great app for you to use when traveling.