Fatal flaw for people with sleep phase disorders – CBT-i Coach Review

I like the design of this app and appreciate that it exists, but it is completely useless for people with sleep phase disorders. My sleep schedule often gets shifted later and later until I'm going to bed late in the morning I'm getting up in the afternoon. There is literally no way to enter this information into the app. For instants if I go to bed at 9 AM and get up at 2 PM in that or how I enter the data, the app tells me got up earlier that I went to bed and won't let me save the entry. The only workaround I've found is to shift every entry earlier by four hours or so then add a note to myself saying to subtract that many hours, but this completely negates the diagnostics feature, so I'm better off with a pen and paper sleep log. The app is great otherwise and I'm more than happy to upload my sleep data for further study, but it's difficult to believe that sleep professionals would design an app that is impossible to use for people with particular sleep disorders.
Review by Pforan on CBT-i Coach.