(Updated) FANTASTIC, but - I LOVE ❤️ this app. It is so useful. I have notoriously bad sleep habits, & this app has improved my sleep & temperament Greatly. However, there seems to be issues periodically maybe when Apple updates their iOs, as just happened. As I am experiencing now, past reviewers have had the app crash in the 3:00 hour which stops all functions. I will keep adjusting various iPho