I am using the Freedom app right now, in order to keep focused on writing this blog post. It lets you block whatever apps and websites you need to, across all the devices you need to, for whichever times you need to. The free version doesn’t let you schedule the times when the blocking will happen, and I have found it well worth paying for the subscription to have that feature. I use it to block me from continuing to distract myself with my phone at bed-time, or wandering off onto social media during work hours.
Unlike the Forest app, the Freedom app does not rely on your willpower to start a session, or to keep it going. You can’t turn it off during a blocking session, and so it can provide a crucial element of structure in my environment that I can’t get from anything else.