Where do you draw the line on client-facing mental health apps?

Curious how practising clinicians think about the consumer app category.

Some of it is clearly adjunct, journaling and mood tracking and so on. Some of it is explicitly positioned as a substitute for therapy. The line between them seems to be getting blurrier in how these things market themselves.

Do clients bring these up with you? And has anyone had to work around what a client picked up from one?