one of the biggest problems of many consumer apps is convincing people to download it and give it a try. For many consumer apps like journaling, fitness tracking, nutrition, ... it seems that letting people use them where they are already spending a lot of time (i.e. ChatGPT) could be a great distribution advantage. Yet I could barely find any purely consumer ChatGPT apps and so I'm wondering what's missing. Any ideas?

but why not?

personally i find it much easier to track my food, workouts, daily diaries etc. in ChatGPT/Claude as I already use them for everything else. no need for a standalone app when the app could simply plugin into ChatGPT.

wondering if it's a UX problem or a more fundamental one like platform risks