Deep work in hours, not minutes.
Sprintbox is a professional time-blocking system for people who work in hours, not minutes. Replace Pomodoro cycles with structured sprints that protect your momentum. Long sprints with flexible breaks. Stay in flow for hours, not 25-minute cycles.
You're stopping exactly when it starts to get good.
It takes roughly 20 minutes to reach a state of deep flow. If you use short cycles, you are paying a "Flow Tax" that robs you of the breakthroughs that only happen once you've settled into a sustained, uninterrupted session.
Every interruption costs you twice.
The 25-Minute Wall
Why you lose flow.
Standard Pomodoro forces stop right as your brain solves the hardest problems. You waste your peak mental state on a forced break.
The Break Spiral
Why you lose the day.
Without a fixed container, a 5-minute break becomes a 2-hour scroll session. One slip destroys the afternoon's structure.
The Context Switch
Why you lose energy.
Managing "what to do next" creates decision fatigue. Every time you pause to plan, you drain the battery you need for executing.
You don't need more time. You need to stop losing the time you have.
The system for deep work.
The Sprintbox Container
A Sprintbox is an unpauseable block of time. It eliminates choice fatigue by locking your start and end times, so you spend your energy on the task, not the clock.
Deep Work Shielding
Tasks are ordered before you start. Once the sprint begins, only the top task is visible to prevent overthinking.
The Rest Budget
Rest without the spiraling into distraction. Your Sprintbox includes a dedicated rest budget that keeps the container intact, so you recover without drifting. And don't worry, you will get a designated break time after your sprint.
The structure that holds focus so you don't have to.
Built for people who do deep work.
You need 45+ minutes just to "warm up" — Pomodoro kills your flow before it starts.
You lose entire afternoons to "break spirals" where 5 minutes turn into 50.
You want to automate your discipline so you can focus purely on the work.
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