The Pomodoro Technique is simple: work for 25 minutes, break for 5 minutes, repeat. It's one of the most popular productivity methods because it's easy to start — set a timer and go. But here's the problem: a timer doesn't stop you from opening Twitter at minute 3.
Most Pomodoro apps are just timers with a tomato icon. They count down. They ding when the interval ends. They do nothing to protect the 25 minutes in between. If you get distracted during a Pomodoro, the timer keeps ticking and you've wasted an entire interval.
Why Timers Without Blocking Don't Work
The Pomodoro Technique assumes you'll stay focused during each sprint. In 2005 when it was popularized, that was more realistic. In 2026, with a browser full of algorithmically optimized content one tab away, pure willpower isn't enough. Studies on digital distraction show that once you context-switch to a social media site, it takes an average of 23 minutes to fully refocus. That's almost an entire Pomodoro — gone.
A Pomodoro timer without website blocking is like a workout plan without a gym. The structure is there, but the environment works against you.
Lock In! Combines Pomodoro with System-Level Blocking
Lock In! has built-in Pomodoro support. Set your work interval length, and Lock In! blocks your chosen websites and apps for the entire duration. When the interval ends, everything unblocks for your break. When the break ends, blocking resumes for the next sprint.
Every Browser, Every App
Blocking works at the macOS system level via a network extension. It doesn't matter if you use Safari, Chrome, or Arc — distracting sites don't load. Pair it with app blocking to shut down Discord, Slack, or games during each sprint.
Strict Mode for Honest Pomodoros
Enable Strict Mode and you can't cancel a Pomodoro early. No "I'll just peek at my feed" exceptions. The interval runs its full duration with all blocks active. This is the Pomodoro Technique as it was intended — uninterrupted focus sprints.
Track Your Progress
Lock In!'s daily stats with a 7-day bar chart show how many focused sessions you've completed. Over time, you'll see patterns — which days you're most productive, when you tend to skip sessions, and how your focus improves week over week.
Give your Pomodoros actual teeth. Get Lock In! on the Mac App Store