---
title: "Mental Math - Kalc - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 cram"
---

# Mental Math - Kalc — United States
> Tables fractions % all ages

![Mental Math - Kalc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/ea/33/c9/ea33c98d-c464-6e4b-7b3f-cada7703da9c/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [LMT Digital Creations](https://apptail.io/developer/lmt-digital-creations-mJS)
**Category:** Education
**Rating:** 1.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** com.lienmuguercia.Kalc
**Store:** Apple App Store
**Country:** United States
**Version:** 1.6.0 (released 2026-09-18)
**Original Release:** 2026-04-29
**Languages:** French, English, Spanish, Italian

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6764098294)
**AppTail Page:** [https://apptail.io/app/mental-math-kalc-wbnA/united-states](https://apptail.io/app/mental-math-kalc-wbnA/united-states)

## Mental Math - Kalc Description
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 and syncs through your personal iCloud account. No ads, no advertising tracking, no cookies.

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

Privacy policy: 
Terms of use: 

## Mental Math - Kalc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/dc/17/68/dc176837-5b9e-a639-beaa-12ef6ffb9411/EN.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/61/e2/39/61e23938-9733-d39a-8d54-824d75be7068/EN__U00282_U0029.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/07/06/16/070616a4-4dc7-d19a-75cf-e26281ccd203/EN__U00283_U0029.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/22/49/7b/22497b85-30c0-0775-26e7-93a57ca15d48/EN__U00284_U0029.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/dc/04/e5/dc04e55a-468a-1cb3-efc6-b2db5e15a616/EN__U00285_U0029.png/1242x2688.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0b/a1/31/0ba13172-5217-8ab7-96f0-0033aaf59dc6/EN__U00286_U0029.png/1242x2688.png)

## Mental Math - Kalc Rating Breakdown in United States
- 5 stars: 0 (0%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 1 (100%)






## Mental Math - Kalc Available In
- [Canada](https://apptail.io/app/mental-math-kalc-wbnA/canada)
- [France](https://apptail.io/app/mental-math-kalc-wbnA/france)
- [United States](https://apptail.io/app/mental-math-kalc-wbnA/united-states)
- [Cyprus](https://apptail.io/app/mental-math-kalc-wbnA/cyprus)
- [Ecuador](https://apptail.io/app/mental-math-kalc-wbnA/ecuador)
- [Hungary](https://apptail.io/app/mental-math-kalc-wbnA/hungary)
- [Italy](https://apptail.io/app/mental-math-kalc-wbnA/italy)
- [Austria](https://apptail.io/app/mental-math-kalc-wbnA/austria)
- [Netherlands](https://apptail.io/app/mental-math-kalc-wbnA/netherlands)
- [Norway](https://apptail.io/app/mental-math-kalc-wbnA/norway)
- [Nepal](https://apptail.io/app/mental-math-kalc-wbnA/nepal)
- [Oman](https://apptail.io/app/mental-math-kalc-wbnA/oman)
- [Peru](https://apptail.io/app/mental-math-kalc-wbnA/peru)
- [Portugal](https://apptail.io/app/mental-math-kalc-wbnA/portugal)
- [Senegal](https://apptail.io/app/mental-math-kalc-wbnA/senegal)
- [Mexico](https://apptail.io/app/mental-math-kalc-wbnA/mexico)
- [Brazil](https://apptail.io/app/mental-math-kalc-wbnA/brazil)
- [China](https://apptail.io/app/mental-math-kalc-wbnA/china)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*