I am considering how to create an iOS application where two distinct user types interact: service provider and consumer. For example, a consumer uploads a file which then notifies and becomes available to a small group of service providers, one of whom accepts, modifies and sends the file back to the consumer. Data would be private between the service provider and consumer. Are there any resources such as tutorials that explain how to create two different types of users who could interact in this manner? Any insight into a viable approach is also much appreciated. Thanks!

I would like to use the on-device optical character recognition feature offered by the Vision framework for reading Japanese text. Will this language be supported soon?