A free app for Android, by Trimble Inc..

The Trimble DL application provides a simple way to capture and view GNSS raw data on your Android device. This tool is perfect for surveyors, scientists, engineers, and anyone interested in the mechanical and electrical properties of the earth. The data can be used for various purposes, including scientific research, surveying, and building mapping. 

You can use the Trimble DL application to survey point-to-point on the surface of the earth, as well as to create high-resolution maps of the surface. You can also use it to determine the position and orientation of an object on the surface of the earth. The data from the receiver can be saved and sent to your office via email.

The Trimble DL application provides a simple and user-friendly interface, which makes it easy to use for a variety of users.