Similar stories have been shown on HN before as well, and I find them fascinating because I just cannot imagine using the methods presented myself (e.g. any kind of managing/planning/checking large parts of one's life with a notebook of some kind). However this obviously does work for other people, to the point I sometimes have the impression there's two kinds of people: those who can use a system like this, and those who don't (and this doesn't have a fixed correlation on person's 'output'). I do get stuff done and know what you mean with focussed work etc, and I do have mental equivalents of todo-lists and habit-tracking and whatnot but if I write them down it just doesn't work and/or I loose interest. Especially todo-lists like you have with set items per day are a complete disaster. Both because I shift things around on the go in whatever way I feel like and because I often have new ideas which have to go on the list leading to more shifting, eventually making the process feel like a waste of time because 'manage todo-list' becomes a major entry on the todo-list.

You show 2 screenshots on your blog post. What app is that?