I used the previous version for years. Im a landscape photographer, and it was a simple, clean interface to determine sunrise/sunset and plan my shoot. There are more sophisticated complex apps, but I always started with this little app.
I updated the app per the annoying little messages, and as feared, it has fewer features than before. Previous version had moon rise/set, and an especially neat feature when you changed from portrait to landscape.
I see no techincal improvements at all, but rather a money grab with the ads. Very, very dissappointing. Suggest you try Sun & Moon, Sunseeker, TPE, or PhotoPills.
BigFan8 about The Sun - Rise and Fall