You need to install Substratum theme engine app to use this theme.

ion theme aiming to be light in size and easy to apply changes for your apps main accents.

✔️ Compatibility :
• Android Nougat 7.1 *
• Android Oreo 8.0 & 8.1 *
• Android Pie 9.0 *
• Samsung Nougat **
• Samsung Oreo
• Samsung Pie [OneUI] **
*AOSP or AOSP based custom ROM
** Requires Root

📰 Available Overlay List
https://kutt.it/ion

💻This theme is open source!
https://github.com/pierx/ion