Plain.

Get as close as you can.

Start a streak today

A little knowledge. A higher climb.

A daily guessing game with room for a good estimate

Play Plain on playplain.io for seven quick number challenges. In five rounds, name something whose real value is close to a target: a country, a chemical element, a planet or a Pokémon, depending on the category. In two estimation rounds, enter a number yourself. Every accepted answer is compared with the day's saved data, and the points lift your hot-air balloon.

One puzzle, shared by everyone

A fresh set opens at midnight in New York. You get one scored flight a day, with a 30-second clock for each round. Play as a guest, or use an account to carry your progress between devices. There are no ads or purchases in this edition.

What to expect in your first game →

Close counts. Fast helps.

You do not need to know the perfect answer. Think in proportions, choose a candidate and see how close it lands. Round three doubles your points. The clock also matters: after three seconds, your balloon loses four metres a second while you decide.

Understand points, bonuses and altitude →

Real numbers you can check

The local question bank covers geography, science, space and Pokémon measurements. Reference years and units matter: a country's land area and its total surface area are different comparisons. Source links explain the saved values behind the questions.

Explore the question bank and sources →

Finish today's flight, then find out why

The puzzle archive reveals completed days with their seven prompts, closest answers and reference values. It is a place to learn, not a second attempt at a ranked flight. If you enjoy a short daily ritual but want a change from spelling puzzles, read our guide to games like Wordle or jump straight into the rules of Plain.

playplain.io is an independent balloon edition with its own game engine and question bank. It is not operated by or affiliated with playplain.app.