Collector pre-populates fields that don't allow nulls with a value - text fields will have a space inserted, numbers will be set to 0, dates will be set to December 30 1899, etc. This means a user can submit a feature without inputting anything, unfortunately.
Thanks for your helpful reply.
Im now facing another issue.
I want my map to be used offline, here are some details about my webmap:
What might be the problem?
thanks in advance.