Ask HN: Productivity tools- Useless, useful or incomplete?

I'm trying to gauge the zeitgeist around productivity tools- todo lists, mindmaps, time trackers, pomodoro timers, trello variants, habit builders, Omni-*, etc

This is because I am building an app, called "tymtu", in my spare time that would enter into that crowded arena. Tymtu is thus far without a clear category or well known description, so I'll just describe it as a product management tool, where you, the user, are the product. But it aims to fill the same role as many pre-existing tools and it should be classified as a "productivity tool".

So my question is "Are these sorts of tools truly useful to you? Or are they just distracting noise? Do you believe that there is some undiscovered country left to conquer? Is it a fool's errand to attempt what so many other's have failed?"