No, it's okay to have it without some salts too. In general, we have cravings for electrolytes in the evening and we need sodium, potassium, and magnesium at that time. Fruits are decent in potassium so adding a little bit of salt (sodium) is ok and it will reduce cravings also.
You mentioned "fruits with some salt" is it necessary to add salt, is there any reason behind it?
No, it's okay to have it without some salts too. In general, we have cravings for electrolytes in the evening and we need sodium, potassium, and magnesium at that time. Fruits are decent in potassium so adding a little bit of salt (sodium) is ok and it will reduce cravings also.