Suggestions
Causal inference
I use Exist to track life problems: low mood, poor sleep, etc. Helpfully, Exist tells me what correlates with these bad events. It would be even more helpful if Exist used causal inference to tell me what factors likely caused my bad events, telling me what to do to improve my mood or sleep better. In the last decade or so, developments in causal inference have allowed people to find causal connections just by looking at observational data, so the data Exist has should be sufficient to make such determinations.