Use APKPure App
Get Custom Themes Installer for OneUI Pie *ALL* old version APK for Android
Une application pour installer et utiliser des thèmes personnalisés sur tous les appareils Samsung Galaxy Pie
You can use custom themes on your OneUI Pie without any trial limit
Supported and Tested Devices
S10/S10+/S10E/S9/S9+/Note9/S8/S8+/Note8/Note FE/S7E(NFE ROM) and all J/A series running Android Pie
The step guide is in the app itself. It has been designed for easy use and setup