Today

About CurvGuessr

CurvGuessr is a daily game about the shape and scale of the world. Each puzzle comes from real, cited data. Guess first, then see what really happened: predicting before you look is one of the most reliable ways to remember data.

How scoring works

Draw the curve (100 pts)
70% level + 30% shape, compared with the best line the grid allows. Level: for each point, the gap to the real value as a share of the chart's height. Landing on the dot nearest the real value is perfect; credit falls to zero at 22.5%. Shape: how well your ups and downs follow the real ones (correlation), so a flat line can't score well on a curve that explodes. The first point is given and 100 means every point is on its perfect dot.
Scale the axis (100 pts)
Scored on the ratio between your guess and the truth, so being 2× too high costs the same as 2× too low. Within one dial notch (±12%) is perfect; 2× off scores about 60; 10× off scores 0.
Name the lines (100 pts)
About 33 points per line you label correctly.
Hints
Every round has an optional hint. Using one caps that round at 80% and shows a 💡 on your share card.

The rules are the same for everyone, every day. Nothing is randomised to make you feel close.

Where puzzles come from

The game draws from 1116 hand-picked charts, each chosen because its shape tells a story. A seeded schedule picks each day's three rounds, so every puzzle is reproducible and each one is frozen once published. Draw rounds follow a weekly ramp: gentle on Monday and Tuesday, tough at the weekend.

Data sources

All data comes from Our World in Data (CC BY 4.0) and the original sources it cites. Some columns are multi-year averages or interpolated; the reveal says so when that's the case.

Privacy

No ads, no accounts, no tracking across sites. Visits and page speed are counted anonymously and without cookies (Vercel Analytics and Speed Insights). An anonymous random ID in a cookie links your plays so your streak survives a cleared cache; your backup code (in Settings) is that ID. You can download everything we store about you at any time.

Design

Drawing snaps to a grid, so you're judged on what you know, not how steady your hand is. Sound, haptics and animation are tuned to feel good without getting in the way and can each be turned off. Streaks forgive: miss a day and you can make it up and freezes cover longer breaks.