The world clock app displays the time in various time zones around the world. It shows the time for different cities or regions, helping users track time differences easily.

The main purpose of world clock applications is to allow users to quickly and easily view different time zones around the world.

The main benefits of world time applications are:

1. Users can quickly see and calculate time differences between different cities or countries.
2. They are useful for business meetings, conferences, or personal communication to determine convenient times for all parties involved.
3. In international travel, they enable planning according to time zones by providing the local time of the destination.
4. They allow monitoring of times in various cities to stay updated on world events or global news.
5. Additionally, they help users set their watches accurately before or during travel, facilitating quick adaptation to time zone changes.

From the left menu on the World Time application detail page, select the city for which you want to know the current time. You can then view the time for various cities around the world.