# EYSK Calculator & Converter — Easy and Powerful Calculator

> Intuitive iOS calculator with scientific, conversion, and advanced mathematical functions. (iPhone/iPad app by Kiseon Cho.)

- Source: https://appshunter.io/ios/app/eysk-calculator-and-converter/id1620029636 (this page in markdown: same URL + `.md`)
- Developer: [Kiseon Cho](https://appshunter.io/developer/1609478221)
- Category: Productivity, Utilities
- Price: Free
- Rating: 3.70/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2022-05-20
- Data updated: 2026-11-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/eysk-calculator-and-converter/id1620029636/reviews.md

## What is EYSK Calculator & Converter?

EYSK Cal brings a wide range of mathematical functions to iOS in a simple, easy-to-use calculator.

Key Features
- An intuitive, smart calculator that’s easy to use
- A clean, simple interface
- Mathematical, scientific, and conversion functions
- A polished layout for expressions, results, and controls
- Convenient, versatile calculation controls
- Results update in real time as you type
- A blinking cursor for easier input and editing
- Four practical tabs: General, Advanced, Constants, and Convert
- Shared expressions and results across all tabs
- Support for multi-step expressions, such as 123 + 456 × 789 ÷ 321 + 123
- Reuse stored results with the M0–M4 text buttons on the left
- Copy stored results to the clipboard with the circular M0–M4 buttons on the right
- A wide range of functions within each category
- Seven color options for the main text
- Customization options to suit your preferences

## Key features

- Intuitive and smart calculator
- Mathematical, scientific, and conversion functions
- Real-time result updates
- Multi-step expression support
- Four practical tabs: General, Advanced, Constants, Convert
- Customizable color options

## Is EYSK Calculator & Converter safe?

Not enough ratings yet to assess EYSK Calculator & Converter.

## Is EYSK Calculator & Converter legit?

EYSK Calculator & Converter appears to be a legitimate app. The AppsHunter Legitimacy Score for EYSK Calculator & Converter is 85 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/eysk-calculator-and-converter/id1620029636/reviews.md

### 1/5 — Great is wrong!

*2026-06-17*

Can’t handle very big numbers

### 5/5 — Neat little toolbox.

*2024-05-11*

Does what I want, which is to compute naturally, i.e., 1   1 = 2 (NOT 1, ENTER, 1,  ).  But it does so much more.  It anticipates the equation, giving you running results.  So, for the equation 2 x 345, it will generate an intermediate result of 6, as soon as you enter "2 x 3".  The intermediate result will change to 68, as soon as you enter the next digit "4".  And the answer will change again to 690, as soon as you enter the final digit "5".  Hit the equals sign and not only does that finalize the answer, but it automatically is saved in a scrolling memory feature.  How neat is that!   Its main shortcoming is that it is limited to single operations only.  No hiearchy of functions and no embedded paranthetical expressions.  Just simple equations.  (However, it does allow you to directly manipulate memory items, so it can be used to evaluate multi-factor/multiple operand equations - but not very elegantly.). Bottom line:  It does what I need a simple calculator to do.  5 stars.

### 5/5 — Great

*2022-05-21*

Great

## Frequently asked questions about EYSK Calculator & Converter

### What devices does EYSK Calculator & Converter support?

EYSK Calculator & Converter is available on Mac, iPhone, and iPad, offering a consistent experience across Apple platforms.

### How often is EYSK Calculator & Converter updated?

The latest version available is 26.10.31, last updated on October 31, 2026. This indicates a history of regular updates for the application.

### What is the age rating for EYSK Calculator & Converter?

EYSK Calculator & Converter has an age rating of 4+, making it suitable for a wide range of users including children and adults.

### Does EYSK Calculator & Converter have ads?

No, EYSK Calculator & Converter does not contain advertisements, providing an uninterrupted user experience.

### What are the different calculation modes in EYSK Calculator & Converter?

EYSK Calculator & Converter features four practical tabs: General for basic calculations, Advanced for more complex functions, Constants for predefined values, and Convert for unit conversions.

### Can I reuse previous calculations in EYSK Calculator & Converter?

Yes, you can reuse stored results using the M0–M4 text buttons on the left and copy them to the clipboard with the circular M0–M4 buttons on the right.

### How does EYSK Calculator & Converter handle complex equations?

EYSK Calculator & Converter supports multi-step expressions, allowing you to input and calculate complex equations like 123 + 456 × 789 ÷ 321 + 123.

### What is the user sentiment for EYSK Calculator & Converter based on ratings?

Based on the provided data, EYSK Calculator & Converter has an average rating of 3.7 stars from 3 ratings, indicating a generally positive but mixed user reception.

## Version history (last 5 releases)

### 26.10.31 — 2026-10-31

What's New in 26.10.31
• Now on Mac, with the same design as iPad
• iPad: new sidebar layout with M0–M9 memory
• Converter: Feet + Inch (5′ 11″) for heights
• Converter: Swap now carries the result over, and chained calculations continue correctly
• Converter remembers your last units
• Haptic feedback option on iPhone
• Fixed: small numbers no longer show in e-notation, and several unit conversion values and names

### 3.0 — 2026-09-02

Updated item as below,
- Standardize the app launch screen across iOS and macOS
- Fix the issue where small numbers are displayed in scientific notation (e.g., using “e”)
- Other improvements

### 2.3 — 2023-07-12

updated item as below,
- change the selected tab background color
- etc.

### 2.2 — 2023-07-11

updated item as below,
- change the Tab button response time
- etc.

### 2.1 — 2023-07-06

updated item as below,
- ICON change
- Minor code change (not bug)

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## More apps by Kiseon Cho

- [Block Puzzle - EYSK TET](https://appshunter.io/ios/app/block-puzzle-eysk-tet/id6449723713)
- [EYSK Jump Counter](https://appshunter.io/ios/app/eysk-jump-counter/id6809053992)

All apps by Kiseon Cho: https://appshunter.io/developer/1609478221

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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 2026-11-03.*