Wikipedia yesterday refreshed its iPhone and iPad app on App Store with a few improvements, including a new black reading theme perfect for the iPhone X edge-to-edge OLED display.
To use the new theme tap the Explore tab at the bottom, then hit that settings cog in the upper-left corner to access preferences. Now tap Appearance, then select Black underneath the Reading Theme headline. A Dim Images switch underneath the Theme Options headline allows you to optionally decrease the opacity of images on dark reading themes.
Aside from the black reading theme and lots of small bug fixes, Wikipedia for iOS version 5.7.3 will use less bandwidth due to a change prompting it to downloaded article images only when they’re about to be displayed. You will also enjoy faster article loading.