Off By

About Off By

Off By is a daily numbers game from Off By LLC, on the web and as an app for iPhone and Android since 2026. Each day brings five quick questions about the real world: how much of a paycheck goes to taxes, how many hours a week people spend scrolling, how many out of 100 US prescriptions are generic. You will not know the exact number, and that is the point.

You answer by dragging a slider, tapping the arrows or typing a number, then lock in. The game shows how far off you were, reveals the real figure and adds a did-you-know fact. Topics range across money and prices, jobs and AI, health and food, sports and pop culture.

The five questions reset at midnight, a round takes under two minutes, and you can build a streak. Playing today's five puts you on the daily leaderboard, and results can be shared as image cards.

It suits people who like Fermi-style guessing and want a small, surprising fact or two each morning.

How to play Off By

1. Open Off By in the browser or the app.
2. Read the question and drag the slider, tap the arrows or type your guess.
3. Lock in to see how far off you were, the real number and the story behind it.
4. Answer all five, then check the leaderboard and come back tomorrow.

Screenshots

Tips

• Anchor on a number you know, such as the US population or a typical salary, and adjust from there.
• For out-of-100 questions, think about whether the answer is likely above or below half before fine-tuning.
• Read the fact after each answer: similar topics come back.

Questions