World Clock — time zones, and when you can actually call
A row of clocks tells you what time it is elsewhere. The useful question is which hour works for everybody — and that is what the meeting planner answers.
Knowing the time is not the same as knowing when to meet
Every phone can tell you the time in Tokyo. What no built-in clock does well is the next step: given London, New York and Singapore, which hours are inside working hours for all three? People solve this with mental arithmetic, get it wrong roughly once per quarter, and someone joins a call at six in the morning.
World Clock keeps your cities on one screen and adds a planner that shows the overlap directly, so the answer is read rather than calculated.
What the world clock app does
Three views over the same set of cities.
- Your cities, on one screen. Add the places that matter — where your team is, where your family is, where you are heading — and they sit together as cards, with daylight saving handled from the bundled time zone database rather than by an offset you have to remember to update.
- A meeting planner. The Best Time to Connect view lays your cities against a shared timeline so the workable overlap is visible at a glance, with a jump-to-now control for orienting yourself quickly.
- A time converter. Pick a specific moment and see it in every city you follow. This is the one you use when someone proposes a time and you need to know what that means for you before agreeing.
- A home screen widget. The cities you care about, readable without opening anything. For anyone who checks another time zone daily, this is the feature that makes the app worth keeping.
- Forty-three cities bundled. Enough to cover the places most people actually need, with the data shipped in the app so it works with no connection.
Offline, and unbothered
Time zone data is bundled, so the app has no reason to make a network request to tell you the time — and it does not. There is no account, no location tracking and no sync. On a long-haul flight, in a country where your data has not connected yet, it works exactly as it does at home.
It also stays a clock. It does not try to be a calendar, a scheduling assistant or a team availability platform. Those exist and they are heavy; this opens instantly and answers one question.
Who uses it
Distributed teams, where getting a three-timezone call right the first time is worth the install on its own. Anyone with family abroad, where the constraint is not working hours but not phoning at 3am. And frequent travellers, who need to know what time it is at home while their own phone has moved.
The widget tends to be what keeps it installed — a glance at the home screen replaces opening an app several times a day.
Accuracy and privacy
Time zone rules, including daylight saving transitions, come from the standard time zone database bundled with the app. Governments occasionally change daylight saving rules at short notice, so a very recent change may need an app update to be reflected.
No account, no location permission, nothing uploaded. The app is free and ad-supported.
Frequently asked questions
Can it find a meeting time across several cities? Yes. The Best Time to Connect view lays your cities on a shared timeline so the overlapping workable hours are visible at a glance.
Does it handle daylight saving? Yes, from the bundled time zone database rather than a fixed offset, so transitions are handled automatically.
Is there a home screen widget? Yes, showing the cities you follow without opening the app.
Does it work without an internet connection? Yes. All time zone data ships with the app, so no connection is needed.
Is it on iPhone? Yes — it is on both the App Store and Google Play.