While the VPN market is flooded with "free" apps and proprietary protocols (like WireGuard, which is also excellent but different), remains the most universal solution. If you need to connect to a university library, a corporate headquarters, or a self-hosted server in the cloud, chances are they support OpenVPN.
Once installed, users can configure OpenVPN Connect by importing a VPN configuration file (usually provided by their VPN service provider) or by manually entering the VPN server details. openvpn connect for windows