Duration ABA includes a dark mode. It uses a pure black background that looks great on the iPhone X, the iPhone XS, and the iPhone XS Max.
To turn on the dark mode, touch the Settings tab on the bottom of the app.
From the settings form, touch the switch next to Dark Mode.
The switch will now be on. You can see that the navigation bar at the top of the app has turned black.
Dark mode will activate immediately across all screens in the app. You can touch again to turn off the dark mode. This is how the main app form looks when the app is in dark mode.