Press
Mental Math.
Made Easy.
Numbio is a mental-math training app for iPhone and iPad. Short, focused sessions cover addition, subtraction, multiplication, division, and more; with adaptive difficulty that meets you where you are, plus mental-math tricks, games, and progress tracking that turn practice into a daily habit.
What others write about Numbio
Numbio has been helping people around the world sharpen their mental math and build confidence with numbers. We love to hear it!
Alpha School
School
MacKenzie Price
•
May 15, 2026
Alpha School uses Numbio with its students and lists it among its 10 favorite AI learning tools.
Read on Alpha School
Astral Codex Ten
Review
Community reviewer
•
Jun 27, 2025
An Astral Codex Ten review names Numbio (then FastMath) as one of the two top apps students use to build arithmetic speed.
Read on Astral Codex Ten
Mental Math Pro
Comparison
Richard Reis
•
Jul 16, 2026
Mental Math Pro names Numbio the best iPhone all-rounder among six mental math apps, based on its App Store listing.
Read on Mental Math Pro
Calculory
Comparison
Calculory Team
•
Apr 25, 2026
Calculory ranks Numbio (FastMath) as the best speed drill app for iOS.
Read on Calculory