世界人口时钟 app for iPhone and iPad

This app uses the data from World Bank to simulate the population growth all over the world.
When tap on the screen, you can get all kinds of statistics. Moreover, this app introduces every country (data from The World Factbook), and it is a good tool to learn everything of the associated country.
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Statistics include 215 countries:
GDP, GDP per capita, Life expectancy, GDP growth, Population growth, Surface area, Population density;
Financial Indicators: Deposit interest rate, Lending interest rate, Tax revenue, Gross domestic savings, Gross national expenditure, Broad money, Education expenditure, Military expenditure, Stocks traded, Listed domestic companies;
Social Indicators: GINI index, Unemployment, Literacy rate, Access to electricity, Poverty ratio at national lines, Prevalence of HIV, Rail lines, Hospital beds;
Average Indicators: GNI per capita, GDP per capita, Electric consumption per capita, Energy use per capita, CO2 emissions per capita;
Population Change: Birth rate, Death rate, Fertility rate, Net migration;
Population Composition: Population ≤ 14, Population 15-64, Population ≥ 65, Urban population, Rural population;
Land Composition: Forest area, Arable land;
Electricity Composition: Nuclear sources, Hydroelectric sources, Oil, gas and coal sources, Renewable sources, excluding hydro;
Trade: Trade, Goods and services imports, Goods and services exports;
Goods Trade Composition: Food, Fuel, Manufactures, Agricultural raw materials, Ores and metals;
Services Trade Composition: Travel services, Transport services, Insurance and financial, Computer and communications.