Hello @Dassman 
Thanks for reaching out! It should be possible to integrate our API with any application or language, our API is openly documented and as you mention we have some client libraries already available (and we are also open to contributions of new or existing libs too). To integrate with react native you could simply do raw queries to our API with the HTTP client that you already have set up.
Our Javascript library is up to date and actively maintained, but if you do notice any issues or features missing when using it feel free to reach out and we can make any needed changes.
We also welcome you to provide any general feedback about our client libraries, either before or after integrating with one, in our dedicated feedback form to help us continually improve.