If you often take outdoor photos and take the job very seriously, you can take a look at Sun Surveyor.
This paid app (you pay about 9 euros for it) gives you detailed information about sunrise, sunset and moon phases.
In practice, the app helps you plan your photo session by providing you with information about lighting conditions and locations. For example, you can see at what times ‘golden hour’ takes place, what the situation is with the visibility per location and how the moon behaves over time. The app also lends itself well to the more professional industry: for example, if you are involved in pre-visualization and want to research in advance what a certain image will look like.
The app makes smart use of it overlays, where the relevant information is placed as an extra layer over the photo image. Do reserve some time to explore the app: a considerable amount of information is displayed. On the tab Photo Opportunities you will find an overview of great opportunities in the field of photography, for example when a solar eclipse takes place. The makers have paid a lot of attention to the explanation of how the app works and have made various explanation videos available.
Sun Surveyor (www.sunsurveyor.com)
Price: about 9 euros
System requirements: Android, iOS 13.0+
Language: Dutch, English