# Xmart Calculator Pro — Programmable calculator

> Programmable calculator with custom functions and instant results. (iPhone/iPad app by XHLIU.)

- Source: https://appshunter.io/ios/app/xmart-calculator-pro/id827740598 (this page in markdown: same URL + `.md`)
- Developer: [XHLIU](https://appshunter.io/developer/460419472)
- Category: Utilities, Productivity
- Price: $5.99
- Rating: 4.40/5 from 152 App Store ratings · 95 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 13 MB
- Languages: American English, Arabic, French (France), German (Germany), Italian, Japanese, Russian, Chinese (Simplified, China), European Spanish
- Released: 2014-03-05
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/xmart-calculator-pro/id827740598/reviews.md

## What is Xmart Calculator Pro?

Let's look at some simple questions: 

Question 1: 
James can make $200 per day, what would be his annual income ( He works 5 days a week, 48 weeks per year) ?

This is easy, just enter an expression as this in Xmart Calculator:  200 x 5 x 48

Question 2: 
How many times of tapping a button to calculate his annual income?

8 times on a normal calculator, 7 times on Xmart Calculator (you don't need to tap the '=' button).

Question 3: 
What if his day rate is $320, $400, $500...?

Well, very similar: 
320 x 5 x 48;
400 x 5 x 48;
500 x 5 x 48...

What's the problem? With a normal calculator, we have to enter the same buttons 'x 5 x 48' very time when the only value changes is just the day rate. 

Is there any way to just enter the day rate  and the result will update automatically?

With Xmart Calculator, YES! You can define a Algebra function like this:
 
"IncomeByDay(X) = X x 5 x 48" 

Then you can just select the function and enter the value for 'X' and the result will update straight away! 

To get James annual income, you just need to tap buttons 4 times.

--
End of questions
--

Xmart Calculator is appreciated as an intelligent, programmable and expandable calculator based on text expression. 

In addition to most of the common and scientific functions, users can also define personal functions.  

All calculations are step-by-step traceable.

**Quick start:

* There is no '=' button in this calculator app, it will calculate and show result as soon as the expression is updated.
* Swipe up/down to hide/show the history records.
* Swipe left and right to hide/show the scientific/math functions.

**Main feature:

* Custom functions: user can define any algebra functions with up to 9 parameters.
* Use a custom function in the main expression or play with it separately. 
* Calculate and show result instantly when the input is updated.
* Most common scientific & math functions are included.
* Save calculation to history 
* Review & Recall history results or expressions
* Name/label a history item meaningfully
* Record and show step by step details of the calculation
* Share history with friends
* Fast mortgage calculator is included


**Additional features

* Support Apple Watch & iMessage
* Auto save: turn ON/OFF or set a custom timer for saving results automatically
* Colours, layouts and fonts are configurable, you can design your own calculator.
* Turn ON/OFF button sounds.
* Select button sound from 6 different options

## Key features

- Define custom algebraic functions
- Instant calculation results
- Step-by-step calculation traceability
- Save and recall calculation history
- Configurable appearance (colors, fonts)
- Includes a mortgage calculator

## What do users think of Xmart Calculator Pro?

Overall sentiment: positive

**Pros**

- 💾 History saving and recall functionality
- 👍 User-friendly and intuitive interface
- 🎨 Customizable colors and themes
- 💡 Custom function creation and storage
- 🚀 Fast and efficient calculations
- 📋 Calculation tape/history display
- ⌚ Apple Watch support
- 🔄 Easy editing of calculations
- 📊 Advanced features beyond standard calculator
- ✨ Clean and attractive design

**Cons**

- 🐛 Glitches with equals button reuse
- 🐛 Preferences window opens unexpectedly
- 📱 iPad landscape-only orientation limitation
- 🐛 Percentage calculations don't work on-the-fly
- 🐛 Decimal multiplication errors (.15*.80)
- 🐛 Inconsistent percentage behavior
- 📱 Limited iPad support/optimization
- 🔊 Loud key click sounds difficult to disable
- ❌ Missing parentheses functionality (older versions)
- 📢 Pop-up ads causing freezing

**Commonly reported bugs**

- Illegal character error when reusing equals button result
- Preferences dialog opens on equals button tap
- Save button disappeared in history feature
- Percentage key calculations malfunction
- Decimal multiplication errors
- Cursor jumping when editing functions
- Pop-up ads freezing application
- Inconsistent percentage operation behavior

**Most requested features**

- Fraction form results display
- RPN (Reverse Polish Notation) support
- Better iPad screen optimization
- Decimal input accepting '.2' as '0.2'
- Smart decimal place display
- Portrait mode option for iPad
- Easier custom function editing interface
- Light color theme with dark font contrast

## Recent user reviews (10 of 95)

All indexed reviews: https://appshunter.io/ios/app/xmart-calculator-pro/id827740598/reviews.md

### 5/5 — Calculator With It All!

*2024-03-27, version 4.1.4*

Has it all, plus saves history so if you forget, question or need to refer to previous calculations you don’t have to redo them.

### 1/5 — Glitchy

*2023-05-24, version 4.1.3*

This Calc is good. But has glitches that don’t get fixed. 

If you do a calculation and use the equals button to use the answer in another calculation it says illegal character found. 
It never used to do this. Any updates should be tested first before release.

### 3/5 — What happened to SAVE button

*2022-09-30, version 4.0.1*

I absolutely loved this app, but for some reason, I can no longer save to my history.  The SAVE button just disappeared.  Help.

### 5/5 — Belle petite calculatrice

*2022-08-06, version 4.0.1*

Simple efficace et on peut garder les calculs en historique contrairement à celle inclus dans iOS d’Apple

### 5/5 — Never paid for a calculator app before this

*2022-08-02, version 4.0.1*

Like the title says, my phone has a stock app calculator so why buy one? Never felt the need until now. This calculator app is brilliant, allowing you to save custom functions and calculations. It saves so much time if you’re always calculating the same things. Also love that it saves your history so if you need to remember what a calculation was, you don’t have to recalculate the whole thing. Amazing!

### 5/5 — Excelente

*2022-07-25, version 4.0.1*

Justo la calculadora que estaba buscando

### 4/5 — This is my go-to calculator

*2021-09-03, version 3.9.2*

This is my go-to calculator

### 1/5 — Why only landscape on iPad??!!!

*2021-08-19, version 3.9.2*

It’s ridiculous, why can’t you dictators give us a choice to use landscape or portrait on iPad??!!! 

It’s so annoying and inconvenient, to have this on landscape all the time!! 

Please amend this oversight.

### 2/5 — Good free app but!

*2021-08-19, version 3.9.2*

Why does preferences open every time you tap the Equals button?

### 2/5 — Percentages?

*2021-08-18, version 3.9.1*

Adding, subtracting and dividing percentages of a number do not work ‘on the fly’. So there is little point in having the percentage key. Otherwise this would be my ‘go to’ calculator.

## Frequently asked questions about Xmart Calculator Pro

### What does Xmart Calculator Pro do?

Xmart Calculator Pro is an intelligent, programmable calculator that allows users to define custom algebraic functions. It provides instant results as expressions are updated and offers step-by-step calculation traceability. It also includes common scientific functions and a mortgage calculator.

### How do custom functions work in Xmart Calculator Pro?

Users can define their own algebra functions with up to 9 parameters. These functions can then be used in the main expression or played with separately. This allows for dynamic calculations where results update automatically when input values change.

### Is Xmart Calculator Pro free to use?

Based on the provided information, Xmart Calculator Pro is a paid application. There are no mentions of in-app purchases or advertisements, indicating a one-time purchase model.

### What are the main benefits of using this calculator?

The main benefits include the ability to create and use custom functions for dynamic calculations, instant results without needing an equals button, and detailed step-by-step traceability of all calculations. It also offers features like saving and sharing history, and a configurable interface.

### Can I use this calculator on other devices?

The application supports Apple Watch and iMessage, suggesting integration with the Apple ecosystem. However, specific compatibility with other operating systems or devices beyond Apple's is not detailed in the provided description.

## Version history (last 5 releases)

### 4.1.4 — 2023-08-04

Bug fixes and performance enhancement

### 4.1.3 — 2023-04-25

1. Square root operator '√ ()' added
2. Use bigger text for calculation history.

### 4.1.2 — 2023-04-14

1. Response quicker when tapping the buttons
2. UI and UX improvements 
3. Performance enhancement

### 4.1.0 — 2023-03-01

Fix logic of percentage calculations

### 4.0.1 — 2021-10-02

Bug fixes and performance enhancement

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## More apps by XHLIU

- [Multi Translate Voice AI](https://appshunter.io/ios/app/multi-translate-voice-ai/id768642496)
- [Live Boards - Train & TFL Time](https://appshunter.io/ios/app/live-boards-train-and-tfl-time/id972122999)
- [Xmart Calculator Mini](https://appshunter.io/ios/app/xmart-calculator-mini/id1240117539)

All apps by XHLIU: https://appshunter.io/developer/460419472

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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 2026-08-29.*