Use APKPure App
Get Panzer War Mod Installer old version APK for Android
Ein Mod Installation Tool
The installation of mod has been simplified by this tool. And it is made by Panzer War official,ShanghaiWindy.
You can select *.modpack file from this tool and it will automatically add it to the game mod folder.
Check out the game Panzer War from here:
https://play.google.com/store/apps/details?id=com.shanghaiwindy.PanzerWarOpenSource
And,this mod tool is open source. https://github.com/Doreamonsky/PanzerWar-ModInstaller