A timer tells you when to work. It doesn’t stop you from picking up your phone at minute seven. That’s why the Pomodoro technique works best paired with some way of keeping distractions out of reach. This guide covers both halves: how to run good focus sessions, and how to block distracting apps on an iPhone, using built-in tools or a focus app.
What the Pomodoro technique is
Francesco Cirillo developed the technique in the late 1980s as a university student, using a tomato-shaped kitchen timer (pomodoro is Italian for tomato). The classic version (Cirillo):
- Pick one task.
- Work on it for 25 minutes without switching.
- Take a short break (about 5 minutes).
- After four sessions, take a longer break (15–30 minutes).
The value isn’t the number 25. It’s that a fixed, short block makes starting easier (“just 25 minutes”), the end point makes it easier to ignore distractions (“I’ll check after the timer”), and the breaks stop you from grinding yourself down.
25 or 50 minutes?
There’s no single right length. Pick based on the work and on you:
| Session | Good for | Watch out for |
|---|---|---|
| 25 min | Starting tasks you’re avoiding, admin, revision, low energy days, tasks with many small parts | Breaking up deep work just as you get into flow |
| 45–50 min | Writing, coding, design and problem-solving that need a long warm-up | Fatigue, and skipping breaks because you “feel fine” |
| 90+ min | Rare, well-rested deep-work blocks | Usually too long without a proper break |
A practical approach: start with 25 minutes. If you regularly hit the bell mid-thought and resent it, move to 40 or 50. If you can’t get through 25 without checking your phone, the problem isn’t the timer length; it’s distractions, which is the next section.
Whatever length you choose, keep the break. Stand up, look at something far away, get water. Don’t spend it scrolling, because that tends to stretch a 5-minute break into 20.
Why blocking distractions matters
Interruptions are costly even when they’re short. In a study at the University of California, Irvine, people who were interrupted during an email task compensated by working faster, but reported more stress, frustration, time pressure and effort (Mark, Gudith & Klocke, 2008).
There’s also evidence that a phone in reach can be distracting even when you’re not using it. In a 2017 set of experiments, participants scored lower on tests of working memory and fluid intelligence when their phone was on the desk rather than in another room (Ward et al., 2017). Later replication attempts have had mixed results, so treat it as a plausible effect rather than a law. But the advice it points to costs nothing: during focus time, put the phone out of sight.
How to block apps on iPhone (free, built in)
Your iPhone already has the basics:
Option 1: A Focus mode
Settings → Focus → + → Custom (or use Work). Choose which people and apps can send notifications. Under Customize Screens, you can pick a Home Screen page that shows only the apps you need. Turn it on from Control Center when a session starts.
Good for: silencing notifications. Limitation: it hides and silences apps but doesn’t stop you opening them.
Option 2: Screen Time Downtime and App Limits
Settings → Screen Time → App Limits → Add Limit lets you cap categories (like Social) or individual apps. Downtime blocks everything except allowed apps on a schedule.
Good for: daily limits and fixed schedules. Limitation: they’re schedule- or quota-based, not tied to a session, and it’s easy to tap “Ignore limit”. Setting a Screen Time passcode that someone else knows makes them much harder to skip.
Option 3: A focus app that blocks during the session
Apps can use Apple’s Screen Time framework to block chosen apps for exactly the length of a focus session and lift the block automatically when it ends. The good ones run this entirely on your phone, so the app never sees which apps you use.
In Habiroot: app blocking during focus sessions is built and waiting on Apple’s approval of the Screen Time permission it needs, so it isn’t available yet. When it ships, you’ll choose apps, categories or websites to block (or block everything), and the block will lift automatically at the end of the session, even if Habiroot is closed. Until then, pair Habiroot’s timer with a Focus mode.
A focus setup you can copy
- Before you start: write the one task you’ll work on. If it’s vague (“work on thesis”), make it concrete (“draft section 2.1”).
- Phone: turn on a Focus mode, then put the phone face down out of reach, or in another room.
- Computer: close the tabs and apps you won’t need. Turn on Do Not Disturb.
- Start the timer: 25 minutes to begin with.
- When a distracting thought arrives: write it on paper and keep going. Deal with it at the break.
- At the bell: stop, even mid-sentence. Leaving a sentence unfinished makes the next session easier to start.
- After four sessions: take a real break, away from screens.
- At the end of the day: look at where your focus time actually went. Per-project stats make this easy.
Making it stick
Focus is a habit like any other. The same rules apply: a stable cue (same time, same place), a small start, and a visible record. In Habiroot, a pot plant grows during each session and each project keeps its own stats, so a good week of focus is something you can see. You can also track “Two focus sessions before lunch” as a daily habit, and let its streak grow a plant in your garden.
Sessions in Habiroot run from 25 to 120 minutes, and focus time earns coins you can spend on new plants. See how Free and Plus compare, or read how to build a streak that lasts.