Take advantage of the vector gradient and a lot of option inside theme to change the primary colors or accent to change the appearance or layout on an app.
Before applying a theme, go to the Manager tab and choose to disable or uninstall overlays. This will make sure to install the theme properly.
Make sure you choose the right Android version from the drop-down menu inside the theme.
Supported Android
{7.1 and UP}
Supported Android Version:-
Jelly Bean (4.1–4.3.1) – KitKat (4.4–4.4.4) – Lollipop (5.0–5.0.2) – Marshmallow (6.0 – 6.0.1) – Nougat (7.0 – 7.1.1) – Oreo (8.0-8.1)
Download Gravija Substratum Theme 9.1231 Patched APK For Android