We need to transform our internal App slowly into the Output Application we want to present as a product of our work at the end.
The separation of Functionality and Design also is a big part of this transformation just like testing the application.
Given this motivation mostly UI and Error Handling is critical. But also still some features need to be added specially for a more generic approach.
This Milestone needs to include a working recording for extended periods and the storage as well as prediction of these.
Also every major feature should be accessible in at most 2-3 clicks like starting a recording.