Numvora

Numvora is an arithmetic trainer designed to sharpen your mental calculation skills through progressive challenges. It presents arithmetic problems across multiple difficulty levels and lets you input answers using a clean, built-in numpad — no keyboard required.

The app tracks your accuracy and response time session by session, letting you see how your calculation speed develops over time. Problems cover addition, subtraction, multiplication, and division, with difficulty scaling based on your performance.

Everything runs locally on your device. No account needed, no internet connection required, no data sent anywhere. Your progress history and settings are stored privately on the device.

The home screen gives you quick access to all sections through a grid of large cards — practice modes, your stats history, and settings. A short onboarding walkthrough on first launch explains the core mechanics, and then you are on your own.

Settings let you adjust the default sort order for your history, choose between 12-hour and 24-hour time display, set the first day of the week, and pick which section opens by default when you launch the app.

Numvora is built for anyone who wants to keep arithmetic reflexes sharp — students drilling for exams, adults who enjoy number challenges, or anyone looking for a focused, distraction-free mental workout without ads or paywalls.