I had the pleasure to be a beta tester for this app, and received it free of charge direct from the developer.
I have been running the program for the past couple days in my car while travelling to work, and running errands around town. I have used the app for about 7 hours total.
This app is terrific, it is perfectly stable, has not force closed, or had a single issue. The menu options are easy to navigate, the help page is terrific and the app works exactly as described.