PDF Expert for iOS supports the system-wide Dark Mode to please your eyes while working at night and help you save the battery. As for the Mac version of PDF Expert, it adjusts to the system settings, but the chosen mode doesn't affect the files themselves. Meanwhile, you can set the Night or Sepia theme to improve your reading experience on Mac.
To enjoy the Dark Mode, please make sure you have iOS 13 or iPadOS and PDF Expert version 7.2.0 or later.
Once you enable the Dark Mode in the Settings app on your iPhone or iPad, PDF Expert also switches to the darkened appearance.
To turn on the Dark Mode on your device, please follow these steps: