Channel Time is described as 'Use /time to convert times'. There are five alternatives to Channel Time for Online / Web-based, iPhone, iPad and Slack. The best alternative is Spacetime, which is free. Other great apps like Channel Time are Every Time Zone (Free), Time&Time (Paid), Timezone.io (Free) and Dilims (Paid).
Modern global teams have awesome people spread across multiple timezones. Lots of teams have digital nomads changing locations faster than we can keep up with. Often it gets tricky to remember what time it is where your teammates are. Enter Timezone.io.
Dilims lets you display different time slots in different time zones to quickly find other peoples local times. Add your co-workers working hours and quickly find overlapping times. - Add multiple time slots for each time zone.