The 1000 days rule is an old wives tale. If a man does not ask to marry you within a thousand days, he will never ask.
The application is for entertainment only. It is not meant to put constraint on your relationship. No timetable should control love. Remember a wedding is only a day...a marriage is a life-time.
Select the date you and your love met and press done. A date will appear. You should be walking down the aisle on or before this date.