In case SmoothWAN does not support the hardware or sources are unavailable like the new GL.iNet devices and FriendlyWrt for NanoPi/BananaPi.
Ported from SmoothWAN.
Requires familiarity with OpenWrt.
Installation video for installing via web interface is provided:
TalalMash/Unofficial-Speedify-Installer-For-OpenWrt: Install & configure Speedify using LuCI (github.com)