Mental Math - Kalc
Tables fractions % all ages
About
Sharpen your mental math skills with daily practice. This app uses spaced repetition to help you master concepts like fractions, percentages, and algebra. It offers two modes for flexible learning and provides real-life examples of how math is used every day.
What's New in Mental Math
1.5.0
July 28, 2026
Practice just got smarter. When you miss a question, Kalc now shows you the mental shortcut to get it right, the difficulty adapts as you improve, and tricky questions return so they really stick. Thanks for all the great feedback. Keep it coming!
MoreIn-App Purchases
$29.99
Accès à vie
Payez une fois, profitez-en pour toujours!
Events
Compte à rebours par question, calibré par domaine
Jun 15, 2026 — Jul 16, 2026
21 jours pour automatiser les réflexes brevet
Jun 1, 2026 — Jun 28, 2026
Developer apps
FAQ
What is Mental Math - Kalc?
Mental Math - Kalc is an educational app designed to improve mental math skills through daily practice. It utilizes a spaced repetition system to help users master concepts like fractions, percentages, and algebra, making learning efficient and effective.
What math topics does Mental Math - Kalc cover?
The app covers a wide range of topics including multiplication and division, fractions (simplification, operations), percentages (calculation, increase, discount), powers and square roots, algebra, order of operations, and addition/subtraction of signed integers.
What are the practice modes in Mental Math - Kalc?
Mental Math - Kalc offers two practice modes: Zen mode, which allows users to practice at their own pace without pressure, and Chrono mode, which challenges users to improve their speed under timed conditions, simulating exam environments.
How does Mental Math - Kalc track progress?
Each skill within the app has its own level and progress bar, providing users with a clear visual representation of their mastery and areas that still require attention. This allows for focused and efficient learning.
Is Mental Math - Kalc suitable for different school systems?
Yes, the app is designed for users from various English-speaking and Spanish-speaking systems, including UK Year 7-10, US Grade 6-9, and Spanish ESO/secundaria. Users select their school system during onboarding, and content adapts accordingly.
Does Mental Math - Kalc have ads?
No, Mental Math - Kalc is ad-free. The app prioritizes a distraction-free learning experience and respects user privacy by not including advertisements or advertising tracking.
What is the pricing for Mental Math - Kalc?
Mental Math - Kalc is free to download and offers one skill for practice without purchase. Full access to all features and content is unlocked with a one-time purchase, available as a lifetime or 1-year non-renewing option, with no subscriptions or hidden fees.
How often is Mental Math - Kalc updated?
The app was last updated on July 28, 2026, indicating regular maintenance and potential feature additions. Users can expect ongoing support and improvements to the learning experience.