Focus mode: one task at a time

The problem with task lists

Task managers have been list-based since the first paper to-do list. Digital tools made the lists bigger, sortable, and filterable — but the fundamental interface hasn't changed: here are your tasks, choose one and do it.

This interface assumes something that isn't true for many people: that looking at a list of tasks and choosing the right one is easy. For neurotypical brains with strong executive function, it is. For everyone else — people with ADHD, anxiety, decision fatigue, or simply too much to do — the list itself becomes the obstacle.

Research on choice overload, first documented by psychologists Sheena Iyengar and Mark Lepper, shows that more options lead to worse decisions and less satisfaction. In their classic jam study, shoppers presented with 24 flavors were 10x less likely to buy than those presented with 6. Task lists work the same way. A Today view with 15 items doesn't give you 15 productive options — it gives you decision paralysis.

The deeper problem is attention residue. Research by Sophie Leroy at the University of Washington found that when you switch attention from one task to another, some of your cognitive capacity stays attached to the previous task. When you're scanning a list of 15 items, trying to choose one, you're creating attention residue on every item you consider and reject. By the time you finally start working, your working memory is already fragmented.

“He has a hard time seeing everything in front of him and attaches to what is yelling at him the loudest.” — Parent of ADHD user, productivity forum

What focus mode actually is

Focus mode is a task manager interface that shows you one task at a time. Not a filtered list. Not a minimized sidebar. One task. Full screen (or full card). With one decision: do it, or skip it.

The concept draws from several established ideas:

The key distinction between focus mode and a Pomodoro timer: Pomodoro manages time (25 minutes on, 5 minutes off). Focus mode manages attention (one task visible, everything else hidden). They're complementary but solve different problems. Pomodoro helps you sustain effort. Focus mode helps you start the right effort.

Which apps have focus mode

Surprisingly few task managers offer a true single-task interface. Here's the landscape:

The gap is striking. The most popular task managers — the apps millions of people use daily — have no focus mode at all. They assume you want to see a list. Many users don't.

Focus mode and GTD: complementary, not competing

A common concern: “If the app picks my next task, am I still doing GTD?” Yes — focus mode operates on top of a fully functional GTD system, not instead of one.

The GTD workflow handles the upstream work: capture, clarify, organize, review. You still maintain projects, define next actions, defer future tasks, and do weekly reviews. Focus mode handles the final step — “engage” — by answering the question David Allen describes as the hardest part of GTD: “What do I do right now?”

Allen himself defines the engagement criteria: context, time available, energy available, and priority. SingleFocus's focus mode evaluates all four automatically. Context through your perspectives and tags. Time through calendar integration. Energy through the energy lens and time-of-day patterns. Priority through due dates, flags, and the ML ranking model. The decision that took you five minutes of list-scanning happens in zero seconds.

You can still open the Today view and see your full list whenever you want. Focus mode is an additional interface, not a replacement. When you want the list, it's there. When you want someone to just tell you what to do next, focus mode is there.

Who benefits most from focus mode

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