The astronomy Photo of the Day app is built with NASA's open-source APIs. This app brings the most beautiful and amazing astronomy picture to you. - 100% free and no ads. This app lets you add photos from the biggest catalog to your home screen in form of widgets. From within the app, - Browse through NASA's Photo of the Day. - Browse random photos. - Add photos to favorites. Widgets - Setup widget of your preferred size. Widgets can be of three types - 1. Photo of the Day - Shows NASA's Photo of the Day on your widget. 2. Random - Shows any random photo from the catalog on the widget. 3. Favourite - Shows your favorite photos right on your home screen.