The World Population Clock app is the best way to know exactly how many people are living in every country in the world, how they're distributed by age, gender, ethnicity, education, occupation, and many other categories.

It's possible to access any of the available countries' data: China, India, Indonesia, Pakistan, Japan, Turkey, Russia, Viet Nam, Malaysia, Philippines, and all others.

If you want to know about a specific country, you can simply select its name and then find all the relevant data at once.

For each country, you can get the evolution of the most important demographic data from 1950 to 2100: birth rates, life expectancy, and so on.

The World Population Clock app can also help you find out how many people are living in each country, the population pyramid for each country, and the corresponding map.