Rickus,
What @Brewhouse_Digital meant was to download the app created with UI Builder and embed it in a native app. What you downloaded looks like either a project template or something else.
When you publish n app in UI Builder, it creates directories and files which are deployed into the /web directory in the Files section of your Backendless application. To get the app, you need to zip up the contents of the /web directory and that’s the content you will be embedding into a native app. Here’s a video that shows how to do.
When it comes to native apps, you can either build that “wrapper” yourself or use a tool that does it for you. Here’s one I recently learned about: https://www.webviewgold.com/ We have not tried it ourselves, but it looks very promising for what you want to do.
Hope this helps.
Regards,
Mark