The free version of AmazeGPS v. 4.5 is here:
http://http://www.brothersoft.com/mobile/amaze-download-4589.html
Just scroll down to the compatible device, download and install.
When it is first run, you sign on as a New User; it will generate a User ID and Password. Input the new User ID and Password when you launch the app the second time.
(Sorry, I had to post enough times to be able to post a link; hope this complies with the TOS)