// SCORE BREAKDOWN
Focused, well-designed mental math trainer with no ads/subscriptions and thoughtful customization, though math training apps exist across price points.
// ABOUT
Euclid is a focused mental math trainer designed to build speed and confidence with numbers. No ads, no subscriptions, no data collection — just you and the math. Choose from 10 operation types — addition, subtraction, multiplication, division, squares, square roots, exponents, percentages, fractions, and mixed operations — and toggle each one on or off to build the exact training session you want. Pick your difficulty: • 1–100 for warm-ups and fundamentals • 100–1,000 for intermediate practice • 1,000–10,000 for serious number crunching • Adaptive mode, which starts easy and raises the bar as you improve Play your way with two game modes: race against the clock in Timed mode, or work through a fixed set of problems in Task mode. Track your progress over time with detailed stats — accuracy, speed, streaks, and session history — so you can see exactly where you're improving and where to focus next. Need a boost? The built-in tips section offers practical mental math strategies to help you solve problems faster. Euclid is a one-time purchase. Pay once, own it forever. No recurring fees, no in-app purchases, no hidden costs. Your data stays on your device. Euclid collects absolutely nothing — no accounts, no analytics, no tracking. Your practice is yours alone. Whether you're a student preparing for exams, a professional who wants quicker calculations, or anyone who enjoys the satisfaction of solving problems in their head — Euclid is your daily mental gym.