Unaffiliated but "Cold Turkey" for Windows/MacOS. They let you create a highly flexible schedule (e.g. lunch breaks), and even support Pomodoro Timers (e.g. 20

Unaffiliated but "Cold Turkey" for Windows/MacOS. They let you create a highly flexible schedule (e.g. lunch breaks), and even support Pomodoro Timers (e.g. 20 on, 20 off, etc). But the biggest feature is privacy respecting (i.e. non-cloud, non-sharing data with advertisers) and non-subscription. It is just an old-fashioned desktop application with several browser extensions. They have some nice website lists to save initial setup time like "social media" or "shopping" that will nuke all the big names. But they support wild cards or even application specific blocks. HN isn't in the "social media" list by the way. It is designed to be hard to bypass/disable/modify. Even how each individual block's settings are locked is very configurable, which is nice. The UI does suffer from the "invisible button" trend, so you'll have to figure out that there are three buttons under each block none of which look like clickable buttons (schedule config, break config, and settings-lock config). Also, the "On" button enables/disables the SCHEDULE rather than the block itself. So if a block isn't working after scheduling making sure it is "On" too. PS - No doubt I'll get crapped on by the "just self-control" crowd. I'd argue that if this problem was easily overcome, people wouldn't be making threads on the topic and continuing to have problems. I don't think application enforcement should be anyone's long term goal, I see it more like a Nicotine Patch, a temp middle-ground to help make achieving your goals easier.