Hi Mickie,
The add and delete icons can be disabled when viewing existing records from the inbox in the field app
by setting the bind::esri:parameters column to "query allowAdds=false." However the web app does not support editing existing records, so adjusting these parameters doesn't have any impact on repeats in the web app.
Repeat add/delete options when collecting new survey vs. viewing in inbox with allowAdds set to false:
Thanks,
-Barbara