Deep Work

A deep work timer that tells you how deep it really was

Pomodoro is too choppy for deep work — 25 minutes barely gets you warm. But "just sit there for 2 hours" isn't a strategy either. TimerDuel runs a chess-clock across your whole session, so you can do a 90-minute block and walk away knowing your actual focus rate, not your wishful one.

Start a deep work session

Pomodoro vs deep work

Pomodoro's 25/5 cadence is designed for shallow, repeatable tasks — clearing inbox, grinding flashcards. Deep work (writing, coding, hard reading, design) needs a long runway. Interrupting at 25 minutes throws away the warm-up.

A deep work timer should let you commit to a long block, then honestly measure what fraction of it was actually focused. That's what the chess-clock does.

A simple deep work protocol

  1. Pick one task. One. Write it on paper.
  2. Block 90 minutes on your calendar and silence everything.
  3. Open TimerDuel and tap Start. Focus side begins.
  4. The moment you context-switch — Slack, email, "quick check" — tap Break.
  5. At minute 90, stop. Note your focus rate. Aim to beat it tomorrow.

What a good rate looks like

  • • 90%+: elite. You're protecting the session well.
  • • 75–90%: strong deep work. This is the realistic target.
  • • 60–75%: okay — usually means your environment is leaking. Fix the leak.
  • • Under 60%: not deep work. Cut the session shorter and remove distractions before the next one.

FAQ

What's a deep work timer?

A timer designed for long, uninterrupted focus sessions (typically 60–120 minutes) rather than short 25-minute Pomodoros. It tracks total focus time and protects against shallow context-switching.

How long should a deep work session be?

Cal Newport recommends 60–90 minute blocks, with up to 4 hours total per day for most knowledge workers. TimerDuel lets you run any length and shows your true focus rate so you can see when fatigue kicks in.

Why measure focus rate instead of just time elapsed?

Two hours at 60% focus rate is 72 real minutes of deep work. Two hours at 90% is 108. The rate exposes which sessions were actually deep — and which were 'deep work theater.'

Is TimerDuel free for deep work?

Yes. Free, no signup, no install. Open it in a browser tab and forget it's there until you need to tap break.

Try a 90-minute block

Free, no signup. Beat your rate tomorrow.

Open TimerDuel

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