What are some alternatives?
When comparing Channel Time and Time.is, you can also consider the following products
Spacetime - Work hour and time zone management for distributed teams.
World Time Buddy - Effortless time conversion and world time.
Every Time Zone - Online tool for keeping up with times around the world.
timeanddate.com - Free Clock for your website or blog!
Timezone.io - Keep track where and when your team is.
Time&Time - Beautiful Time Zones Converter