An add-on to enable rootless mode for stock Android Oreo devices (8.0+) on our main theme engine, Substratum, downloadable here: https://play.google.com/store/apps/details?id=projekt.substratum
Thank you to all our testers in making this possible and the people who believed in us enough, you guys were great motivations!
You can obviously root your device and have substratum working perfectly fine in OMS mode (with root), but this will be a gesture of thanks to the team!
You must have ADB installed on your computer, as well as our desktop client to use this app, if you don't, Substratum will close and a notification will show in your status bar! Desktop Client: https://forum.xda-developers.com/apps/substratum/andromeda-desktop-clients-release-notes-t3668682