Hi - sorry, have been out of the office since Thursday.
Yes, you can enter data manually. When creating a roast, it defaults to "pending" and is tagged complete as you press the stop button and finish the roast. But, RM will also tag a roast as complete when you manually enter the roast date and/or duration. So, you can create a roast, change this information (entering crack information and such) and it will be the same as any other roast you "performed" using the roast console in the app.
Hope this helps - let me know if you have any other questions.
Danny