Our criteria for a time zone converter are simple, but also make it easy to remove many from the list. This was the basis for creating our criteria for this app category. I needed an app that could allow me to set future times in different time zones (not just my own local time) so that I could find a great time for us all to meet without causing any confusion with the group. For scheduling meetings in the future, it’s imperative that the app can show you those future times across all time zones. Macs and iOS devices have world clocks built into the OS, but they can only show you the current time. In some time zones, you’re not even on the same day of the week. I quickly realized that using a world clock that only shows current time wasn’t very helpful for scheduling meetings in the future. I rely on my iPhone to convert time zones while I’m trying to schedule a meeting so everyone can attend. I frequently have to set up meetings between groups of people that span several time zones - sometimes up to 5 or 6 different zones across the world.

If you have colleagues, family, or friends in other parts of the world, you know how much of a headache converting time zones can be - especially if you’re dealing with more than just two zones.

We spent several weeks looking at over two dozen time zone iOS apps to determine which one makes dealing with multiple time zones easy and simple. Zones is our favorite time zone calculator app for iPhone because of its simple UI, minimal functionality, and ability to look at specific future times in many time zones.

Timezone calculator