I built something like this as well called TVSK (ios only): check it out here: https://www.producthunt.com/posts/tvsk https://www.producthunt.com/posts/tvsk. My

I built something like this as well called TVSK (ios only): check it out here: https://www.producthunt.com/posts/tvsk https://www.producthunt.com/posts/tvsk. My app allows you to estimate time of subtasks and see it bubble up through parent projects.