Photo editor Snapseed for Android has been updated for the first time since September of last year to version 2.19. Owned by Google app got the dark theme and the adaptive icon for Android Oreo and above.
The dark mode of registration is enabled from settings, but it will not help the owners of smartphones with OLED matrices to conserve energy, as the background becomes dark grey and not completely black.
Snapseed can be installed from the Play Store, but if you update through it has not come yet, the latest version of the app available on APKMirror.