Feedless blocks your Facebook, Twitter, and Instagram feeds in Safari on your iPhone. You can use all other parts of the services as usual, we just block the feed. Take control of your time, and say goodbye to mindless scrolling!
Prod blocks websites you waste time on and unblocks them once you've finished your to-do list.
That's the basic premise of Prod, but it has other ways of gently nudging you to be productive. Every aspect of Prod is designed to make productivity easy and time-wasting hard.
Also, it's free, has no ads, and will never bug you for money.
PawBlock is a browser extension that lets you choose which sites you want to stop yourself from accessing. It uses pictures of cute animals to provide some emotional motivation.