I removed it a long time ago, since openflow’s website no longer gets tested in cordova ( but it still work if you add cordova-plugin-remote-injection and redirect the user to the site and not use a webview )
I started a little on a react native version, but time simple has not been there for me to make it anything usable. The main driver for an app ( for me at least ) is push notifications. And rumours say apple will support web push on latest ios and macos, so doing an PWA is a much better solution then. ( i added webpush to openflow and nodered a few months back )