Calcul Mental - Kalc
Calcul Mental - Kalc Summary
Calcul Mental - Kalc is a mobile Android app in Education by LMT Digital Creations. Released in Apr 2026 (1 month ago). It has about 54+ installs Based on AppGoblin estimates, it reaches roughly 54 monthly active users . Store metadata: updated Apr 29, 2026.
Recent activity: 54 installs this week (54 over 4 weeks) View trends →
Store info: Last updated on Google Play on Apr 29, 2026 .
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App Description
Build your automaticity. 10 minutes a day to master mental math for middle school
Kalc helps your middle school student master the essential math skills needed for the French national diploma exam (Brevet) — in just 10 minutes a day.
Aligned with the official French curriculum (grades 6, 7, 8, and 9), Kalc adapts each session to your child's specific needs using a spaced repetition system (SRS): poorly understood concepts are revisited more frequently, while newly mastered concepts are gradually spaced out.
UNLIKE OTHER APPS
Existing mental math apps are generic, in English, and not aligned with the French curriculum. Kalc is designed specifically for French-speaking middle school students (France, Belgium, Switzerland, Canada).
WHAT KALC COVERS
• Multiplication and division (tables, decimals)
• Fractions (simplification, operations, fractions of an integer)
• Percentages (calculation, increase, decrease)
• Exponents and square roots
• Algebraic expressions and order of operations
• Addition and subtraction of integers
TWO PRACTICE MODES
• Zen Mode: at their own pace, without pressure, to solidify the basics
• Time Trial Mode: against the clock, to develop speed under exam conditions
VISIBLE PROGRESSION
Each skill has its own level and progress bar. Your child can see exactly where they are and what they still need to master.
HOME SCREEN WIDGETS
Track progress directly from the iOS home screen, without opening the app. Streaks, XP, and current skills are visible at a glance.
SMART REMINDERS
Maximum 5 reminders for the first 3 weeks, which can be disabled at any time. No spam.
ONE PURCHASE, NO SUBSCRIPTION
Kalc is free to download (3 skills accessible without purchase). Full access is unlocked with a single purchase (lifetime or 1-year non-renewable subscription), with no hidden monthly fees.
PRIVACY
All data remains on the device and syncs via your personal iCloud account. No ads, no ad tracking.
Kalc is designed for middle school students who want to improve their math skills—not for those who just want to pass the time.
Privacy Policy: https://lmtdigitalcreations.com/kalc/privacy.html
Terms of Use: https://lmtdigitalcreations.com/kalc/terms.html