Functionality is OK (see the screen shots on the app page) - that is, if you can get past the advertisements.
Full screen advert pop up on every app launch, and on every switch away and back to the app. And periodically while viewing or switching between screens. And of course, the usual freebie-style bottom banner ad which displays all the time.
Some of the Ads include (or are full-page) auto-playing videos which of course force you to use your internet bandwidth and CPU and battery, and some cannot be stopped until certain amount has been watched, or you kill the app.
On first launch it asked for Location service of either Always even when not running, or never. Which is of course a stupid either-or-choice, because I do NOT want GPS location services invoked and used when the app is not running or not being viewed. Where is the choice to Only use location while app is actively being viewed? That is in Settings / Privacy / Location where it does seem to offer a more sensible (A) Never or (B) While Using App choice. Not sure why the difference from the apps first startup choice to the different choice in iPhone Settings.
If you love to watch and click advertisements, this is the app for you.
If you dont like noisy visual and audio distractions, then pass on by. There are other choices for sunrise and sunset info.
I am deleting the app. Wish I could give it ZERO Stars.
beginnersview about Sunrise Sunset Times