This is a great posting!  When someone is dealing with stress, depression, and similar difficulties, having an option to use an App, as apposed to or along-with meeting with a therapist, can be a very good tool. 

It is very important for a therapist to be aware of his/her mental health, most importantly, and also, to know how to keep their own mental health "challenges" (for lack of better wording) in check.  Also, inorder to understand and empathize appropriately with your clients' challenges with therapeutic process, it is helpful to do some yourself.