I have just completed a development process with @pmusaraj. He built custom, white label mobile apps for our Discourse community. In my opinion, he did an outstanding job in every way. If you are looking for a custom, white label mobile app, then I would recommend you definitely consider Penar for your project.
Thanks for your efforts. Is the code open source? Obviously those who care about privacy will want to inspect the source code to ensure their communications are being handled with the utmost of care.