I’m currently using “OpenVPN for Android”, and it mostly works, but the UI is very dated and hard to use (I can’t figure out how to delete a VPN profile), and crashes if it goes into split screen mode. Is there a better open source VPN client for Android that supports OpenVPN or Wireguard configuration files?
Unfortunately, no. However, the Wireguard app does work for non-Mullvad Wireguard connections. It’s not as easy or convenient to use as MullvadVPN’s app, but it’s not difficult either.