Timezone.io vs World Time Buddy (2026): which should you pick?

Pick Timezone.io if

• Fits if you need to check the time in another city or compare two places
• Works for developers who want a free time zone API

Look elsewhere if

• Not for you if you want a calendar or scheduling app: it has no events or booking pages
• Skip it if you need a phone or desktop app, as it runs in the browser only
• Watch out: monthly API quotas are not enforced yet, and accounts will be emailed first
• Watch out: paid API plans are billed monthly and are non-refundable except where the law requires

Pick World Time Buddy if

• Fits if your team is spread over three or four time zones and you want working hours side by side
• Works for picking a call time for people in different countries

Look elsewhere if

• Skip it if you want an actual calendar, because it converts times and hands them to one
• Not for you if stale apps worry you, with the iPhone app last updated in November 2020 and Android in January 2020
• Tight if you won't sign in, as renaming places and grouping them in tabs on the website needs an account
• Watch out: the Android app carries ads, and the iPhone app shows a $2.99 upgrade with no word on whether it renews
• Not for you if you want a desktop app, as it's the website and phones only

Timezone.io

• It is not a calendar or scheduling app: it has no events, invitations or booking pages, and it runs in the browser only.
• The pricing page says monthly API quotas are not enforced yet, and that accounts will be emailed before they are.
• Paid API plans are billed monthly through Stripe and are non-refundable except where the law requires otherwise.
• Descriptions on zone, country and city pages are AI-assisted drafts that the site says are fact-checked and reviewed by a person.

World Time Buddy

• Renaming locations and grouping them in tabs on the website require signing in.
• The iOS app lists a $2.99 in-app upgrade, although the maker's mobile page gives a workaround that unlocks it free of charge.
• The App Store shows iOS version 1.28 from November 2020, and Google Play shows the Android app last updated in January 2020.
• Google Play labels the Android app as containing ads and in-app purchases.

Timezone.io

World clock by zone, country and city

Pages for every time zone, country and major city show the current local time, UTC offset and daylight saving dates, computed from the IANA time zone database.

Time zone converter

Compare the time in two places, with the offset between them spelled out.

Team boards

A team shares one public link, and teammates add themselves without an account. The board groups everyone by local time and has a slider to see who is awake at a later hour.

Time zone API

Endpoints look up the zone at a latitude and longitude, convert a time to up to ten zones with daylight saving gaps flagged, and list the candidates behind an abbreviation such as CST.

Clear plan limits

Every API plan has every endpoint, so plans differ only by request volume, per-second rate, support and SLA.

World Time Buddy

Hour-tile time comparison

Add locations by searching for places or time zones such as UTC, reorder them by dragging and mark one as home. Each location gets a row of hour tiles aligned with the others.

Select and share a time range

Click and drag across the hour tiles to pick a range, then open it in Outlook, iCal, Google Calendar or Gmail, copy it to the clipboard, or create a public event page.

Google Calendar overlay

Signed-in users can overlay Google Calendar above the hour tiles to find open slots. The mobile apps can show the device's calendars in the same position.

DST warnings and weekend marking

Daylight saving warnings appear a week before a change. Weekends are highlighted, including in countries where the weekend is not Saturday and Sunday.

12-hour, 24-hour or mixed format

Hours can be shown in 12-hour or 24-hour format, or in a mixed mode that uses each location's native format.

Embeddable widgets

A world clock widget and an event widget can be placed on a website. Both detect each visitor's time zone, and the event widget shows the event in the visitor's local time.

Timezone.io

• Free$0

  API plan: 100,000 requests a month, 5 requests a second, every endpoint, commercial use allowed, no card needed.

• Developer$20

  per month

  API plan: 1 million requests a month, 25 requests a second, and 10% headroom before requests are refused.

• Business$100

  per month

  API plan: 10 million requests a month, 100 requests a second, a 99.9% uptime SLA and priority email support.

World Time Buddy

• Free$0

  The website with all features, plus the iOS and Android apps without the in-app upgrade.

• Upgrade$2.99

  in-app purchase on the App Store; billing basis not shown

  The iOS listing marks location groups as the pro feature. The maker's mobile page describes a temporary workaround that unlocks the upgrade at no charge.