I work as a developer in US startup which creates medical apps. We have started using SWIFT.It has been fun and equally challenging to work. But I think swift is future and you should not have any second opinion about using swift in production app
Hi,
If you want to create API, why dont you use onlinewebapi.com
It is still in beta stage but looks promising
Disclaimer: I am founder of this product. Feedback would be valuable. :)