Hello,
App42 iOS API written on Synchronous/Asynchronous mode. In Asynchronous mode we have used completion blocks which we are going to support in future as well. For backward compatibility, we have maintained the separate Framework, which you can find in the version folder from
here. We will recommend you to update your project because we are going to deprecate synchronous API in 4.0 release.
Let us know if you have more question for us.
Thanks,
Himanshu Sharma