I downloaded the app this morning and found the instructions to install and get started pretty clear. I like the format and the defaults.
I echo others concern about the ability to access the data over time. I used to track in an app called "Waterski", it worked well for the basics of balls and line length but when the developer got tired of supporting it and Apple updated its operating system the data is no longer available. I like the suggestion made by JRS about a process similar to the one used by the pilot log book.