Focussu Pro is described as 'Focussu increases productivity by stopping you from spending time on time-wasting, distracting websites. By blocking these website from Safari, you will not be tempted to visit them…!'. There are three alternatives to Focussu Pro for a variety of platforms, including Mac, Windows, iPad, iPhone and Android. The best alternative is Freedom. It's not free, so if you're looking for a free alternative, you could try Citrus.
Freedom is an application that disables networking on an Apple computer for up to eight hours at a time. Freedom will free you from the distractions of the internet, allowing you time to code, write, or create.
1Blocker is the fastest and most powerful Safari content blocker that improves your browsing experience by blocking ads, trackers, and other unwanted content, such as popups, cookie notices, comments, and more.
Citrus is an app that actively blocks distractions before they ever get to you. Simply tell Citrus what distracts you, and when you want it blocked, and Citrus takes care of the rest! CItrus actively blocks your distractions as you work!.