Information about iObs itself, like the version and the people behind the app, are visible by going to Menu/About.
Task bar
The task bar has two options, to rate the app in the Apple app store or to send feedback through email.
Data usage
The screen shows the current data usage for species lists, observations and photos, and the total.
Libraries
iObs is build on open source components. By clicking on "Libraries" you'll see all licences and attributions.