Mental Math - Kalc

10 minutes a day to keep your mental math sharp. Whether you're in middle school, in high school, or an adult who wants to reconnect with math, Kalc helps you forge solid mental reflexes, without cramming.

Spaced repetition system (SRS): concepts you master space out over time, the ones you miss come back the next day. The method known to deliver the most learning per minute practiced.

WHO IT'S FOR

· UK students (Year 7-10), US students (Grade 6-9)

· Other English-speaking systems (Canada, Australia, Ireland, NZ)

· Spanish-speaking students (Spain ESO, Mexico secundaria/preparatoria)

· French-speaking students (France, Belgium, Switzerland, Quebec)

· Adults who want to get back fluency with mental math

Each user picks their school system during onboarding. Content and examples adapt.

WHAT KALC COVERS

· Multiplication and division (times tables, decimals, signed)

· Fractions (simplification, operations, fraction of a whole)

· Percentages (calculation, increase, discount, compound change)

· Powers and square roots

· Algebra and order of operations

· Addition and subtraction of signed integers

TWO PRACTICE MODES

· Zen mode: at your own pace, no pressure, to consolidate the basics

· Chrono mode: against the clock, to build speed under exam conditions

VISIBLE PROGRESS

Every skill has its own level and progress bar. You see exactly where you stand and what's left to master.

IN REAL LIFE

Every session ends with a concrete example of how this skill serves you day to day: splitting a restaurant tab, reading a paycheck, working out a discount, planning a budget. Mental math is something you actually use.

HOME SCREEN WIDGETS

Track your progress straight from your iOS home screen, without opening the app. Streak, XP and skills in progress at a glance.

MEASURED REMINDERS

Up to 5 reminders over the first 3 weeks, off at any time. No spam, no guilt-tripping.

ONE-TIME PURCHASE, NO SUBSCRIPTION

Kalc is free to download (1 skill available without purchase). Full access unlocks with a single purchase (lifetime or 1 year non-renewing). No traps, no hidden paywall.

PRIVACY

All your data stays on your device. No ads, no advertising tracking, no cookies.

Kalc is for people who want real progress in mental math.

Privacy policy: https://lmtdigitalcreations.com/kalc/privacy.html

Terms of use: https://lmtdigitalcreations.com/kalc/terms.html