A focus timer on the Safari new tab, installed from the App Store. It keeps correct time through Safari suspending background tabs on iPhone, and your work and break lengths sync between your Mac and your phone.
The Safari-specific flow, start to finish.
A short tour of the widget. Already sold? Skip ahead.
Safari is the strictest browser about sound: nothing plays until you have interacted with the page, and in Safari on iOS a tab left in the background is frozen outright rather than merely slowed down. The Pomodoro Timer is built for that. It records when the phase began and works out the remaining time from the clock whenever it renders, so an iPhone that put Safari to sleep for twenty minutes still shows the right phase and the right seconds when you come back. Pressing Start counts as the interaction Safari needs, so the end-of-phase chime plays on the Mac from then on; on the phone the timer is right on return even when the chime was not allowed to fire.
There is no Pomodoro in Safari itself and, because Safari extensions must ship as App Store apps, few third-party ones exist. Start Page HQ installs from one listing for macOS 12.4+ and iOS 15+, so the timer on the Mac and the one on the iPhone are the same widget with the same settings. Start a work block at the desk and the phone shows it counting down, with no separate app and nothing to pair.

Pair the Pomodoro Timer widget with these. One install gets you all of them.

The task this pomodoro belongs to, one line above the timer.
Log the day as done once the fourth pomodoro lands.

For work you would rather measure than box in.

A deadline counting down in days beside the timer counting down in minutes.

Park the stray idea here and get back to the block.

Something to read during the five-minute break.
The Pomodoro Timer widget is one of 50+ in Start Page HQ. Tasks, notes, RSS, AI tools, dev utilities — the same install gives you all of them. Start free with 8 widgets on a page, or lift every limit at $3.99/month, $25/year, or $49 lifetime.
Yes. Safari on iOS freezes background tabs, but the widget stores the start time and recalculates the remaining time when the tab is shown again, so the countdown is right the moment you return. Only the sound needs the tab to be in the foreground.
Safari refuses to play audio on a page you have not interacted with yet. Pressing Start satisfies that for the rest of the session. If you reopened Safari and the first phase ended before you clicked anything, click once anywhere on the dashboard and the next chime plays.
Open the app once, then tick Start Page HQ under Safari → Settings → Extensions on the Mac. On iPhone or iPad, go to the Settings app → Safari → Extensions and switch it on with Allow.
Yes. Durations, display style, and the sound setting are stored on your Start Page HQ account, so signing into the same account in Safari on each device shows the same timer. This does not go through iCloud, and it also reaches other browsers.
Free plan, no credit card — see plans or try the demo without installing.