Swift Dark is a Substratum theme with 200+ handmade overlays, utilizing a chosen shade of dark gray for the backgrounds and maintaining the apps original accent and main colors wherever possible. - Nougat: you will require root, or even a custom OMS-ready ROM. About Samsung Nougat, you will require a different, paid add-in produced by the Substratum team. - Oreo: you will require root, or a custom Sysserv ROM, or even a separate, paid add-in created by the Substratum group to theme without root by triggering Substratum through ADB. - Samsung Pie ONLY FOR S9, S9+, NOTE 9: you can root your device or use the different, paid add-in developed by the Substratum group to theme without root by triggering Substratum through ADB. - Pie: you have to root your device to use some other Substratum theme onto it! This includes any other Samsung Pie device of course. - Android 10: you have to root your device to use any Substratum theme on it! We now support OxygenOS along with AOSP ROMs. INSTALLATION: 1: Be certain that you have everything that you want to use the Substratum theme engineoptimization. 2: Download the Substratum theme engine app as well as also the theme. When you start the Substratum app youll locate the theme inside. 3: Open the theme inside the Substratum app and select your System from the menu at the very top. After that, choose the apps you want to theme and then proceed with setup. 4: Wait till all overlays are installed and then reboot. If you're using Oreo or Pie, then you might need to allow all overlays from the"Supervisor" inside the Substratum app after installing overlays and rebooting for them to properly work. Be certain that you read the extended instructions in the Documentation! !! Remember to uninstall all of overlays before upgrading your firmware (OTA)!! If you require help please get in touch with us Telegram or by email and we'll help you based on what system you're using. Take care not to report bugs in the inspection system as it is a lot easier for us to help you by chat or email. REFUNDS: if you downloaded the app and you can't use it, you may repay it in the Play Store in just 2 hours from cellphone and 48 hours in desktop computer provided that it was your first purchase. Alternatively, you may email us your GPA purchase number code within 48 hours of your order for us to send the refund request to Google Play when possible.