The new resolution and lens calculation app now allows the user to input the camera angle and then it will provide the pixel density at three points in the image - bottom, top, as well as the target distance.  In addition, the new version allows users to introduce a level of jpeg noise to more accurately reflect the image quality that would be present with the given equipment.  The new version is also available for the existing Iphone App.  

In addition to this Theia's online calculator version is also available in Russian and Portuguese in addition to English.