My mobile app has a screen which shows Emergency contacts for that user. Contacts can be 1 or more than 1. What is correct standard or practice to show screen title - Contact/s OR Contact(s).
The Gregg Reference Manual recognises plural endings in parentheses as being the defacto way of showing conditional plurals.
i.e. Contact(s) rather than Contact/s.
However, in your case there seems to be no benefit to putting the plural ending in parentheses, so simply using Contacts would have the same effect and be more readable.
"Emergency Contact List" might be clearer and not need to be singular or plural, but kind of long.
I don't think there's anything wrong with a plural header and only one item. It's different from seeing "1 somethings" ...just my opinion