This blog post reads like an advertisement for InFlow (YC S21), which was roundly criticized for being exploitative of people with ADHD, when it was posted to HN last year: https://news.ycombinator.com/item?id=28877003
[Edit: the author has clarified below that this wasn't actually an advertisement, she just enjoyed the app. I'm sorry for jumping to conclusions and overreacting and ranting about it. My apologies for writing all the bullshit above and below.]