What is Popdle?
Popdle is a free daily geography game that challenges you to estimate the population of a different country each day. You have six guesses to land within 5% of the real figure, with higher/lower feedback after every attempt. A new country is selected each day using live data from Wikidata and the World Bank, so the populations stay current. Once you finish the daily puzzle you can jump into unlimited practice rounds to sharpen your skills on any country in the world.
How to Play
Enter your estimate in millions — for example, type 0.8 for 800,000 or 67 for 67 million. After each guess Popdle tells you whether to go higher or lower and shows a color-coded accuracy band: green means you are very close, yellow means you are in the right ballpark, orange means you are fairly far off, and red means you need a much bigger (or smaller) adjustment. You win as soon as one of your guesses falls within 5% of the actual population.
Scoring System
Your score is the number of guesses it takes you to land in the win range. A perfect 1/6 means your very first estimate was within 5%. After the game you can share an emoji board — a row of colored dots and arrows that summarizes your path — so friends can compare scores without spoiling the answer. The color bands work on percentage error: within 5% is green (win), 5–10% is yellow, 10–25% is orange, and beyond 25% is red.
Strategy: How to Guess Smarter
The most effective approach borrows from binary search, the same algorithm computers use to find a value in a sorted list. Instead of counting up from small numbers, start with a guess that splits the plausible range in half. Most sovereign countries have populations between about 10,000 and 1.4 billion, but you can narrow that window quickly by thinking about what you know: is this a large Asian or African nation, a mid-size European country, or a small island state?
Each guess should maximize the information you gain. If you guess 50 million and the answer is "lower," you have eliminated every value above 50 million in one move — that is far more efficient than starting at 1 million and inching upward. After two well-placed guesses you can usually narrow the range to within a factor of two, which leaves you three or four guesses to close in on the 5% target.
Reference Points Worth Memorizing
Anchoring your guesses to a few well-known populations makes the game much easier. India and China each have roughly 1.4 billion people. The United States sits around 335 million, Indonesia around 275 million, and Brazil around 215 million. In Europe, Germany is the largest at about 84 million, France and the United Kingdom are each near 67–68 million, and smaller nations like Portugal or Greece are in the 10 million range. In Africa, Nigeria leads with over 220 million, while Ethiopia and Egypt are each above 100 million. Knowing these benchmarks lets you estimate neighboring or similarly sized countries by comparison rather than guessing in the dark.
Why Population Knowledge Matters
Population figures sit behind almost every headline about economics, elections, climate impact, and public health. A country's GDP per capita, its representation in international bodies, the scale of its healthcare system, and the carbon footprint of its citizens are all functions of how many people live there. Playing Popdle every day builds an intuitive sense of global scale — the kind of background knowledge that helps you read the news more critically and understand why some countries carry outsized influence in world affairs while others are frequently overlooked.
Ready to test your knowledge? Read the full strategy guide for more tips, or scroll up and start guessing.