Population Clock is an iOS tool for learning about geography and demographics.

Download app on iTunes

The project uses the most recent data from these two trusted sources:

• World Development Indicators - The World Bank
• The World Factbook - CIA

Besides the iOS app, there are a few Python scripts to execute the following actions:

• Scrape the country descriptions and energy production from the World Factbook.
• Download the most recent indicators from World Databank using their JSON API (Some updates are quarterly and others yearly).
• Generate plist file with all indicators and descriptions to use with Xcode.
• With population growth data, create colored SVG map.
• Generate 8-bit greyscale map with one color per country. This allows us to identify which country was clicked by reading the color of the selected pixel.

Here is a list of the metrics displayed in the app. Some countries do not have all the data.

• Access to electricity (% of population)
• Birth rate, crude (per 1,000 people)
• CO2 emissions (kt)
• Death rate, crude (per 1,000 people)
• Energy Production (kWh)
• Fertility rate, total (births per woman)
• Forest area (% of land area)
• GDP (constant LCU)
• GDP growth (annual %)
• GDP per capita (constant LCU)
• Health expenditure, total (% of GDP)
• Internet users (per 100 people)
• Life expectancy at birth, total (years)
• Mobile cellular subscriptions (per 100 people)
• Passenger cars (per 1,000 people)
• Population growth (annual %)
• Population, total