Three methods
- Web search — type “time in Tokyo” and you have it. Good for a one-off check.
- Phone clock app — add a few cities to the world clock list. Good for cities you check often.
- World clock app — adds whether people are in work hours and when to meet.
Web search
Fastest for a single answer. But you retype it every time, three cities means three searches, and it needs a connection.
Phone clock app
Both Android and iPhone clock apps have a world clock list that shows each city’s time and offset. That covers “what time is it”. Whether that time is before work, lunch or the middle of the night is still up to you to work out.
World clock app
These are real screens from the Android app "World Time Board". The screenshots were taken with Seoul as the home city.
Every city on one screen
Add cities on the Cities tab and the Board tab lists each one with its current time, offset and date. A 24-cell bar under each city colours work hours (green), early/late (orange) and night (navy), so you can tell at a glance whether someone is at work.
Picking cities
Search 102 built-in cities by city or country. Five slots are free; watching an ad adds three more. For places not on the list, watch one ad to open the Zone pack and search every IANA time zone ID.
Everything is calculated on the device, with no server or sign-in, so it works in flight mode.
Side by side
| Web search | Phone clock | World clock app | |
|---|---|---|---|
| Several cities at once | One at a time | List | List + hour bars |
| Are they at work? | Work it out | Work it out | Colour-coded |
| Pick a meeting time | No | No | Slider + best-time finder |
| Offline | No | Yes | Yes |
| DST change warning | No | No | From 14 days before |
FAQ
When is the phone clock enough?
If you only glance at one or two cities now and then. A world clock app earns its place once you schedule meetings across several countries.
Is there an iPhone version?
It is currently available on Android (Google Play).
World Time Board - Time Zones
No sign-in, no internet needed, and your city list stays on your phone. Free on Android.