When you open the theme in the substrate application, you will see the drop-down menu above the overlays. You must choose a function from your Android ROM version. There are also overlays with different variants for the specific Android version.
+ Theme works with custom 7.1.x / 8.x ROMs with OMS support (LineageOS and OxygenOS are not fully supported)
+ Theme works with Google’s stock-7.1.x / ROM 8.x (Note that ROM actions have thematization limitation)
+ Theme does not work on devices that do not meet the above requirements
+ You need the Play Store Substrate app to apply the theme
+ You must be rooted
Supported Android
{7.0 and UP}
Supported Android Version:-
Nougat (7.0 – 7.1.1) – Oreo (8.0-8.1)
Download Mono Art substratum 17.5 Patched APK For Android