App shows approximate moon phase for current or any selected date. Main purpose of the app is to use widget on your home screen. Widget can only show moon phase for today.

Adding widget to the home screen differs in accordance with mobile phone model or Android OS version. Nevertheless, procedure is usually following:
(1) long press to the home screen
(2) choose to add a widget
(3) from the list of widgets select and drag Moon Phases Widget to the home screen
(4) configure the widget and add it to the home screen.

TIP: Click on the widget opens the main app.

NOTE: It might happen (after the app update) that widgets do not refresh automatically anymore. In this case please uninstall and install the application.