About
This game challenges you to estimate answers to complex questions without looking them up. It trains your reasoning skills by breaking down problems and making educated guesses. Compete on daily leaderboards and track your progress.
What's New in Fermi
1.0.3
October 10, 2026
New: Play with friends. Start a game, send the code, and everyone answers the same five questions in their own time. Then see who got closest, question by question. New: Hard mode. 20 seconds a question, no calculator. Pure instinct. Fermi now also speaks Turkish, German, Spanish and Dutch. It follows your iPhone's language, or pick one under You > Preferences.
MoreEvents
The fermi.gg guessing game, now with friends
Oct 11, 2026 — Nov 10, 2026
Developer apps
FAQ
What is Fermi?
Fermi is a daily guessing game where you estimate numerical answers to challenging questions. It focuses on training your reasoning and problem-solving abilities rather than memorization.
How does Fermi scoring work?
Your score is determined by how close your estimated number is to the actual answer. A score of 1x means you were exactly right, and lower scores are better.
Can I play Fermi offline?
The description does not specify offline play capabilities. However, it mentions a daily set of questions, suggesting an internet connection may be required to receive them.
What is the pricing for Fermi?
Fermi is free to download and play your first round. A subscription is required to unlock all daily rounds, the archive, and the detailed working behind each answer.
Does Fermi have ads?
No, Fermi is ad-free. The description explicitly states there are no ads in the middle of a question.
What devices does Fermi support?
Fermi is available on iPhone and iPad devices.
How often are new questions released in Fermi?
A fresh set of three questions is released every morning, providing a daily challenge for users.
What is the age rating for Fermi?
Fermi has an age rating of 4+, making it suitable for a wide range of players.
