Swift Dark Substrate theme makes more than 200 dark apps and supports the following systems:
Open the theme in the bedrock app and select your Android version from the menu at the top. Also select the applications you want to install the theme and press.
Wait until all the overlays are installed and then restart.
Download the theme Substrate engine application and theme. When you open the substratum application you will find the theme inside.
Supported Android
Download Swift Dark Substratum Theme +Oreo Samsung theme 15.6 Patched APK For Android