First release.
Keep your landowner permissions and your findspots in one place, and let the app work out the Treasure Act notice period for you. The clock counts from the day you first thought a find might be treasure, not from the day you dug it, and it always shows you which date it counted from.
Generate a permission agreement for the landowner to sign, and export a finds record laid out with the fields a Finds Liaison Officer asks for.