These types of apps are sometimes compared to personal assistants, someone working in the background to keep your schedule in check and make sure you have the information needed to coast through a busy day.
If you see no benefit, there are in general two paths your doctor might recommend (and I say doctor in the generic sense, given that many folks nowadays see physician assistants or nurse practitioners who often -- in my experience -- do a better job diagnosing and treating depression than do MDs).