Your blocklist turns itself on when the timer starts, and off when you finish. Nothing to remember, nothing to toggle.
Willpower is a bad blocklist. The reliable version is one that activates without being asked, at exactly the moment you sit down. Studova's website blocker is tied to the focus timer: start a session and your chosen sites are unavailable, end the session and they come back.
It runs as a desktop browser extension paired to your account, so the block follows your sessions rather than needing a separate schedule you also have to maintain.
Tied to the session, not to a schedule
Most blockers ask you to configure hours in advance, which fails the moment your day moves. Studova already knows when you are studying, because the timer is running, so the blocklist inherits that state automatically.
Your list is yours: add the handful of sites that actually cost you sessions rather than trying to block the whole internet.
Fewer ways to talk yourself out of it
The commitment settings decide how easily a block can be lifted mid-session. On the stricter levels, ending a session early takes a deliberate action and gets recorded, so the pattern shows up in your stop-reason analytics later.
Studova also tracks why sessions end, which turns a vague feeling that you get distracted into a list of the specific things that stop you.
Distraction control across the app
Full-screen focus mode hides the rest of the interface during a session. Soundscapes give you rain, lo-fi or layered noise without a second tab open on a music site, which is one of the more common ways a session quietly ends.
On Android, app blocking is available for the apps that pull you away from the desk entirely.