Is this just Pomodoro with extra steps?

Pomodoro is the timer. A focus session adds the single-task lock — the screen showing only the task you chose, its notes, its subtasks, with other apps and items not reachable without ending the session. The timer is a small part of the experience; the lock is what makes it different.

What happens if I get interrupted mid-session?

Tap to end the session, or pause and resume. Focus Mode One doesn't punish you for ending early — the point of the lock isn't to trap you, it's to make staying the path of least resistance. The session can also be extended on the fly if you're in flow when the timer runs out.

How is this different from screen-time limits or app blockers?

Inverted. Screen-time limits block many apps. A focus session does the opposite — it shows you one thing. The result is the same (fewer distractions), but the framing matters: the app isn't telling you what not to do, it's giving you the work you chose, alone, on screen.

What Is a Focus Session, and Why a Timer App Isn't Enough

Open a Pomodoro app. Set a twenty-five-minute timer. Start. The timer counts down. You start working. Three minutes in, you check Slack “just for a second.” The timer kept running, but the session didn’t.

A timer is the minimum-viable focus session. It’s the alarm clock for attention. It does one thing: marks time. Everything else — what you’re working on, whether anything else can interrupt, where the work actually lives — is on you. That’s the gap.

What’s missing from a plain timer?

Three things:

A single-task lock. A timer tells you to work; it doesn’t tell you on what. You can spend twenty-five minutes “focusing” and switch tasks four times. The session is technically complete; the work isn’t.

Context next to the work. Most tasks have notes, subtasks, links, context. With a plain timer, that context lives in another app. Switching to grab it is the same friction as switching to anything else.

Visual containment. The screen still shows everything else. Notifications, other apps, the dock, the next thing on the list. You’re using attention just to ignore.

A focus session that solves these is a different kind of tool. Not a timer with extras — a state.

What does single-task lock actually mean?

In Focus Mode One, when you slide to start a focus session, the screen collapses. You see one task — the one you chose — with its notes and subtasks beneath it. No other items, no scroll, no other apps reachable without explicitly ending the session. The timer is there, but it’s almost incidental.

The lock isn’t punitive. You can end the session at any time. The point isn’t to trap yourself; it’s to remove the cost of staying. The default action becomes “keep working,” and the alternative requires a conscious step.

Why does this work better than willpower?

Because willpower is finite and attention is plentiful — when nothing else competes for it. A focus session is a small environment design choice. You’re not deciding minute-by-minute whether to check email; the question doesn’t come up because email isn’t a tap away.

People often think they need to get better at resisting distractions. Usually they just need fewer of them visible. A single-task lock makes that the default, for twenty-five minutes at a time, on demand.

When is a focus session not the right tool?

For shallow administrative work — clearing email, batch errands, things that benefit from rapid context switching — a focus session is overkill. You don’t need attention containment to send seven calendar invites.

For interrupt-driven work where you’re on call (support shift, parenting, anything where someone may need you in the next twenty-five minutes), focus sessions still work, but the right session length is shorter. A ten-minute session is still useful.

The strong case for a focus session is creation work: writing, coding, designing, deep reading, deep thinking. Anything where the cost of context-switching dominates.

How long should a focus session be?

The classic Pomodoro length is twenty-five minutes. It’s not magical; it’s just long enough to settle into the work and short enough that even a bad day produces some output.

Most experienced focus-session users end up running forty-five to ninety-minute sessions on creative work, with breaks in between. The point isn’t to hit a specific number; it’s to find the length where you reliably settle into the task without exhausting the attention budget.

In Focus Mode One, you can set the duration when you start, and extend on the fly when you’re in flow.

Where does this leave Focus Mode One?

The focus session is the only feature in the app where you do the actual work — everything else (the wizards, the planning surface, the goal links) exists to set you up for it. The session is the moment planning becomes execution. The point of the day is what happens between “slide to start” and “session complete.”

A timer is the simplest version of that. A focus state — single task, context, no escape hatch — is the version that actually changes how a session feels.