I'm not part of the Phaser development team, but I imagine the 3rd party tool they're referencing is Cordova. If you're using the CLI generator for Cordova, you

I'm not part of the Phaser development team, but I imagine the 3rd party tool they're referencing is Cordova. If you're using the CLI generator for Cordova, you'd put your finished project in the `www` folder and plug in your test device to see how it runs. This creates a webview app that runs on Android and iOS devices. I'm not an Android or Swift dev, but I imagine you can just stick it in a native webview, which is what I believe Cordova does. As for performance I can't imagine it's super-performant, but I do know the lead dev does his best to aim for 60fps rendering even under heavy duress.