# Mental Math - Kalc — Tables fractions % all ages

> Daily mental math practice app using spaced repetition for all ages. (iPhone/iPad app by LMT Digital Creations.)

- Source: https://appshunter.io/ios/app/mental-math-kalc/id6764098294 (this page in markdown: same URL + `.md`)
- Developer: [LMT Digital Creations](https://appshunter.io/developer/640455461)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 1.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.6 · 15 MB
- Languages: American English, French (France), Italian, European Spanish
- Released: 2026-04-29
- Data updated: 2026-08-15
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/mental-math-kalc/id6764098294/reviews.md

## What is Mental Math?

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

## Key features

- Spaced repetition system (SRS)
- Covers multiplication, division, fractions, percentages, algebra
- Zen and Chrono practice modes
- Visible progress tracking
- Real-life math examples
- Home screen widgets
- Customizable reminders

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Accès à vie | $29.99 | one-time |
| Plan Annuel | $17.99 | one-time |



## Frequently asked questions about Mental Math

### 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.

## Version history (last 5 releases)

### 1.5.0 — 2026-07-28

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!

### 1.4.0 — 2026-06-08

Kalc now supports Italian.

### 1.3.0 — 2026-06-06

Kalc now speaks Spanish and English

### 1.2.0 — 2026-05-26

Nous avons effectué quelques ajustements sous le capot pour rendre l’expérience plus fluide au quotidien.

### 1.1.0 — 2026-05-09

Quelques ajustements sous le capot pour rendre l'expérience plus fluide.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*