Yes. You have the full version of the application for unlimited time, without additional cost. There is no monthly subscription or in app-purchase or ads or anyhthing like that.
I know that our contributions description are not clear but we cannot change them anymore now that the KS is started.
For beta tester pledgers, you will have access to all beta version, even ones after first release. It means you will have access to new features before others and, with your comments, can influence MyMiniReport evolution.