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Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| World Time Buddyworldtimebuddy.com | Citymappercitymapper.com | OpenStreetMapopenstreetmap.org | Passport Indexpassportindex.org | |
|---|---|---|---|---|
| What it does | Lines up several cities' clocks in one strip so you can see the overlap | Public-transport directions that tell you which carriage to stand in | A map of the world anyone can correct, and everyone else can reuse | Shows where a given passport gets you in without applying for a visa first |
| What it costs you | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. |
| Your files | Runs on their server | Runs on their server | Runs on their server | Runs on their server |
| Where it stops | The free view holds only a handful of cities at once, and saved event scheduling and calendar sync are paid. | Only about a hundred cities are supported — outside them it has nothing to offer. | It is a map and an editor, not a navigation app — there is no live traffic and no turn-by-turn guidance on the site itself. | Entry rules change without notice and depend on residence, purpose and transit — confirm with the embassy before you buy a ticket. |
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| Category | Maps & Travel | Maps & Travel | Maps & Travel | Maps & Travel |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
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