# Mencal - Mental Math Tricks — Calculate Without Calculator

> Learn and practice mental math tricks for calculations without a calculator. (iPhone/iPad app by 军 曹.)

- Source: https://appshunter.io/ios/app/mencal-mental-math-tricks/id638609565 (this page in markdown: same URL + `.md`)
- Developer: [军 曹](https://appshunter.io/developer/550794042)
- Category: Education, Productivity
- Price: $0.99 with in-app purchases (on sale, was $2.99)
- Rating: 4.50/5 from 26 App Store ratings · 77 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 10 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2013-04-26
- Data updated: 2026-09-12
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/mencal-mental-math-tricks/id638609565/reviews.md

## What is Mencal?

Mencal is an app help you expand your ability to mentally solve math problems. All of us can do simple addition and subtraction of one or two digit numbers without a calculator.Now mencal is here to kick that ability into overdrive.

Mencal provides you with lessons and simple tricks to allow you to: work with three digit numbers; fractions of different styles regardless if you are adding them or subtracting them; and finding sums with multiplication and division. Then it will test you on your grasp and knowledge of the methods you've learned. 

• Example:
Same ten's digit,1's sum to 10
    38×32=1216
 ①:Multiply tens place digit by itself plus 1
    (3+1)×3=12
 ②:Add two zeros to the end of step①
    12←00=1200
 ③:Multiply the two one's digits together
     8×2=16
 ④:Add the results of step ②and③
     1200+16=1216

• Quickly Square:
- Square numbers made up of 1's
- Square numbers made up of 3's
- Square numbers in the 90's
- Square numbers ten`s digit is 0
- Square a number ending in 25
- Square numbers made up of 6's
- Square numbers made up of 9's
- Square a number ending in 1
- Square a number ending in 5
- Square a number ending in 9
- Square numbers in the 10's
- Square numbers in the 40's
- Square numbers in the 50's
- Square numbers in the 500's
- Square numbers in the 600's
- Square numbers in the 700's
- Square numbers in the 800's
- Square numbers in the 900's

•Standard:
- Same ten's digit, 1's sum is 10
- Same ten's digit, 1's sum isn`t 10
- Same 1's digit, ten's digits sum is 10
- Same 1's digit, ten's digits sum isn`t 10
- two-digit number ab×cc (a+b=10)
- ab×ccc.....c (a+b=10)
- Multiply by 11
- 2-digit number if 1's digit is 1
- 2-digit number if tens place digit is 1
- 2-digit number ×2-digit number(universal)
- Multiply differing by 5
- Multiply differing by 6
- Multiply differing by 7
- Multiply differing by 8
- Multiply differing by 9
- Multiply differing by 10
- Multiply two numbers that in the 90‘s
- Two-digit number like ab+ba
- Three-digit number like abc+cba
- Two fractions like 1/a+1/b
- Two fractions like (a-1)/a + (b-1)/b
- Sum of first n odd numbers
- Sum of first n even numbers
- Two-digit number like ab-ba
- Three-digit number like abc-cba
- m-n if m+n=100,1000,10000...
- Two fractions like 1/a-1/b
- Two fractions like c/a-c/b
- Two fractions like (a-1)/a-(b-1)/b
- Divide any number by 5
- Divide any number by 25
- Divide any number by 125
- Divide any 3-figure number by 9

"This app rocks!! Great for Math Team practice!" - by Bubba Smith
"Great app, make me feel less stupid" - by Howie_Serious 
"Its a useful app for anyone who wants to know the numbers deeper" - by sjzbim 
"It's a good app for both kids and sometimes even adults" - by Willwang

Love mencal or have a question? We would love to hear your feedback! Contact us anytime at instantcj@gmail.com

## Key features

- Mental math lessons and tricks
- Multi-digit number calculations
- Fraction addition and subtraction
- Multiplication and division techniques
- Number squaring methods
- Practice tests and quizzes

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all math games | $0.99 | one-time |
| Unlock Numbers Mode | $0.99 | one-time |
| Unlock Operators Mode | $0.99 | one-time |
| Unlock Fractions Mode | $0.99 | one-time |
| Unlock Random Mode | $0.99 | one-time |


## Recent user reviews (10 of 77)

All indexed reviews: https://appshunter.io/ios/app/mencal-mental-math-tricks/id638609565/reviews.md

### 5/5 — 数学

*2026-07-08*

对我很有意义帮助

### 5/5 — Beautiful app

*2026-03-18*

Five star app

### 5/5 — 看起来不错

*2025-12-22*

闲来无事锻炼一下大脑挺不错的

### 5/5 — 给好评解锁模式

*2025-05-10*

讨厌这种胁迫

### 5/5 — this is a useful ap app

*2025-04-20*

there has many function

### 4/5 — I absolutely wonder

*2025-02-20*

Mind setting

### 5/5 — Good education app

*2024-07-08*

A good one to start with

### 5/5 — 很多实用方法

*2024-04-23*

记住啦，就变数学大师了

### 4/5 — Not bad

*2024-03-16, version 4.2*

Bit of fun.

### 5/5 — 不错

*2024-02-27*

非常有趣味的一款软件，也容易上手

## Frequently asked questions about Mencal

### What does Mencal do?

Mencal is an application designed to help users improve their mental math abilities. It provides lessons and tricks for performing calculations such as addition, subtraction, multiplication, division, and squaring numbers without the need for a physical calculator.

### What kind of math tricks does Mencal offer?

The app offers a wide range of tricks, including methods for working with three-digit numbers, adding and subtracting fractions, and performing multiplication and division. It also includes specific techniques for quickly squaring various types of numbers and performing standard multiplication and division operations.

### Is Mencal free to use?

The application is free to download and use, but it does offer in-app purchases. This means you can access basic features for free, with the option to buy additional content or features if desired.

### Who would benefit from using Mencal?

Mencal is beneficial for anyone who wants to enhance their mental calculation skills. This includes students preparing for math tests, individuals participating in math competitions, or simply anyone who wishes to become faster and more accurate at performing calculations in their daily life.

### How does Mencal help users learn?

Mencal employs a dual approach of teaching specific mental math tricks through lessons and then testing the user's understanding and application of these methods through practice quizzes. This combination of learning and testing helps reinforce the learned techniques.

## Version history (last 5 releases)

### 4.2 — 2022-04-28

1. Use iCloud to store learning data
2. Fix the issue that the learning data is not saved
3. Fix the  issue that game center is not logged in
4. Fix horizontal screen display bug

### 4.1 — 2022-04-05

• Fixed some minor bugs 

Love Mencal or have a question? We would love to hear your feedback! Contact us anytime at memosetapp@outlook.com

### 4.0 — 2022-04-03

1. Brand new user interface
2. Support dark mode
3. Adapt to iPad, support horizontal orientation and multiple windows
4. Support full screen learning on iPad
5. Modified the group of courses
6. Show courses’ learning progress 
7. Change learning progress manually
8. More practice groups added
9. Fixed some other minor bugs 

Love Mencal or have a question? We would love to hear your feedback! Contact us anytime at memosetapp@outlook.com

### 3.70 — 2018-01-01

This app has been updated by Apple to display the Apple Watch app icon.

● Ready for iPhone X
● Additional bug fixes and stability improvements
● Remove math game In-App purchase

### 3.62 — 2017-05-11

#bugfixes

## Apps similar to Mencal

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## More apps by 军 曹

- [Memoset - Vocabulary Learning](https://appshunter.io/ios/app/memoset-vocabulary-learning/id1358697033)
- [LogicBox: Brain Training](https://appshunter.io/ios/app/logicbox-brain-training/id1617747598)

All apps by 军 曹: https://appshunter.io/developer/550794042

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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 2026-09-12.*