The main differences between WorldTimeBuddy, timeanddate.com, and TimezoneLink in 2026 are: advertising (WorldTimeBuddy and timeanddate serve ads; TimezoneLink does not), account requirements (WorldTimeBuddy limits features without an account; TimezoneLink has no account requirement for any feature), and city depth (TimezoneLink covers 246 cities with deep Africa coverage that neither competitor matches at editorial depth).

Quick comparison table

When to use TimezoneLink

You need zero ads and zero tracking. TimezoneLink is the only major timezone tool that serves no advertising and runs all calculations locally in your browser. If you are using a work device subject to data policy constraints, or you simply do not want your timezone lookups contributing to an ad profile, TimezoneLink is the only option in this category that genuinely delivers on this.

You are coordinating with African cities. TimezoneLink covers 246 cities including secondary African cities — Kampala, Dar es Salaam, Addis Ababa, Lusaka, Harare, Dakar, Abidjan — that WorldTimeBuddy and timeanddate list only at capital-city level without editorial depth. The meeting planner works for any of these cities with no extra setup.

You do not want to create an account. Every TimezoneLink feature — converter, world clock, meeting planner, .ics export, shareable links, timers — works without registration. WorldTimeBuddy requires an account to save more than a few city combinations; Calendly and Doodle (often suggested as alternatives) require both parties to have accounts.

When WorldTimeBuddy is better

WorldTimeBuddy's visual tile slider UI is more intuitive than TimezoneLink's table view for quick visual comparison across multiple time zones simultaneously. If your team already uses WorldTimeBuddy and the visual slider is a core part of how you work, the drag-to-find-overlap interaction is genuinely better for that specific use case than TimezoneLink's current interface.

WorldTimeBuddy also has native iOS and Android apps. If you need a timezone tool you can use entirely on mobile without a browser, WorldTimeBuddy has a polished app; TimezoneLink currently offers a browser-based progressive web app only.

When timeanddate.com is better

Timeanddate.com has 20+ years of archived DST data, historical calendar tools, astronomical data (sunrise, moon phases), and a public holiday database covering 230+ countries. For research that requires historical DST records — when did a country change its clocks in 2004? what was the UTC offset of Casablanca in 1985? — timeanddate is the only free tool with this depth.

If you need a timezone tool for pure timezone coordination and meeting scheduling, timeanddate's breadth is also its disadvantage — it is a very large, multi-purpose tool, and the relevant features are often several clicks away. For focused timezone work, TimezoneLink is faster to use.

Privacy deep-dive

WorldTimeBuddy uses Google Analytics and serves third-party advertising. When you visit worldtimebuddy.com without an account, your timezone preferences, location data, and usage patterns are passed to Google's advertising network.

Timeanddate.com serves display advertising from multiple ad networks including Google AdSense. The site uses analytics tracking and advertising cookies. Ad blocking extensions interfere with the site's revenue model, so the experience degrades with an ad blocker active.

TimezoneLink has no analytics scripts, no advertising code, and no third-party cookies in its codebase. The timezone data — 246 cities, IANA offsets, DST rules — is bundled into the browser-side app. Your timezone lookup does not touch a TimezoneLink server. This is a structural privacy difference, not a policy statement.

The honest bottom line

WorldTimeBuddy is better if you want a visual tile slider UI and a native mobile app. Timeanddate.com is better if you need deep historical DST data or public holiday calendars. TimezoneLink is better if you want the fastest, cleanest timezone converter with no ads, no account, no tracking, and the deepest Africa city coverage available in a free tool.