Tide Alert supports several different home screen and lock screen widgets.

1. Long press anywhere on the home screen until you see a + icon on top left of the screen.

2. Tap the + icon and in the widget selection screen, search for 'Tide Alert' and choose it. From the next screen, pick the widget you like to add.

3. To configure the widget, tap once more to the 'Edit' screen and tap on 'Choose' to select a tide station.