In the web app smart add it is possible to set the "start on" using the '^' switch. All known groups are supported here: Inbox, Today, Next, Tomorrow, Waiting, Someday. On the Android App only the next days appear in the list: Today, Tomorrow, Saturday, Sunday, ...., Wednesday. Trying "Test ^Next" or "Test ^Someday" doesn't move the task to the according group. Those keywords don't even appear in the dropdown list. Therefore I always have to use the inbox and move the tasks later.