# e-calcPro

> Scientific and engineering calculator with history, variables, and advanced functions. (iPhone/iPad app by e-skett Corp..)

- Source: https://appshunter.io/ios/app/e-calcpro/id603391408 (this page in markdown: same URL + `.md`)
- Developer: [e-skett Corp.](https://appshunter.io/developer/591591895)
- Category: Productivity, Utilities
- Price: $0.99
- Age rating: 4+
- Requires: iOS 12.0 · 10 MB
- Languages: American English, Japanese
- Released: 2013-02-25
- Data updated: 2026-08-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/e-calcpro/id603391408/reviews.md

## What is e?

This calculator can be used not only in scientific notation(e.g. 1E-6) but also using engineering multipliers(e.g. p,n,u,m,k,M).

Features
- Calculations History and reuse it
- Calculation history is automatically saved when exit app,can also scroll.
- Can use engineering multipliers,6 Special buttons
- Four user-defined constant
- Four interactive variable
- Three buttons can be insert formula
- interactive variable can have alias
- Functions: √,log,ln,sin,cos,tan,sinh,cosh,tanh,asin,acos,atan,asinh,acosh,atanh,e^x
- Built-in Constants:π,bk,q,e0 and Operator　^
- Autocomplete parentheses
- ON/OFF function key click sound
- Mail transmission function of the calculation history
- Built-in Online Help Viewer
- Universal App

There are also "e-calcFree" feature limited edition.

## Key features

- Scientific and engineering notation
- Calculation history
- User-defined constants and variables
- Advanced mathematical functions
- Formula insertion
- Autocomplete parentheses

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/e-calcpro/id603391408/reviews.md

### 1/5 — 返金してほしい

*2015-10-14*

2^1E-9=-8
と出る。

## Frequently asked questions about e

### What is e-calcPro?

e-calcPro is a paid scientific and engineering calculator for iPhone and iPad that supports advanced notation, functions, and user-defined variables. It was last updated on September 28, 2023.

### What devices does e-calcPro support?

e-calcPro is a universal app that supports iPhone, iPad, and iPod touch devices. It is suitable for users aged 4 and above.

### How much does e-calcPro cost?

e-calcPro is a paid application priced at $0.99. There is a feature-limited free version called 'e-calcFree' available.

### Does e-calcPro have ads?

No, e-calcPro does not contain advertisements. It is a paid app with no ads.

### Can I save and reuse calculations in e-calcPro?

Yes, e-calcPro features a calculation history that is automatically saved when you exit the app. You can scroll through and reuse past calculations.

### What advanced functions are available in e-calcPro?

e-calcPro includes a comprehensive set of functions such as square root, logarithms (log, ln), trigonometric functions (sin, cos, tan, and their inverses), hyperbolic functions, and exponential functions (e^x).

### How often is e-calcPro updated?

The latest version of e-calcPro, version 1.41, was released on September 28, 2023. Updates are released periodically to improve functionality and reliability.

### Does e-calcPro allow for custom constants and variables?

Yes, e-calcPro allows you to define four user constants and four interactive variables. These variables can even have custom aliases for easier use in calculations.

## Version history (last 5 releases)

### 1.41 — 2023-09-28

Improved the problem when the iPhone setting is in dark mode.

### 1.40 — 2023-09-26

Optimized screen display and fixed some bugs.
Changed the keypad size of iPad. And split view is now supported.

### 1.31 — 2019-02-24

Support fot iOS 12

### 1.30 — 2015-11-05

- Changed to be able to erase the calculation history by the [AC]  Press and hold.
- When you press the 'x' or '/' after pressing  '='  automatically "()" is inserted.
- The URL Scheme is  'e-skett.e-calcPro'.

### 1.22 — 2015-05-06

Fixed a small bug.

## Apps similar to e

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Backlog by Time Engine](https://appshunter.io/ios/app/backlog-by-time-engine/id6470202026) | — | Free | Productivity |
| [LifeNote-Record Your Life](https://appshunter.io/ios/app/lifenote-record-your-life/id1627909837) | — | Free | Productivity |
| [Clipboard Remote - LAN Paste](https://appshunter.io/ios/app/clipboard-remote-lan-paste/id6692629153) | 4.0 (4) | Free | Productivity |
| [GENCHO](https://appshunter.io/ios/app/gencho/id1522463100) | — | Free | Productivity |
| [InkPlanner](https://appshunter.io/ios/app/inkplanner/id1665455386) | 4.4 (7) | Free | Productivity |
| [Pipefitter](https://appshunter.io/ios/app/pipefitter/id1043963852) | 2.7 (3) | $6.99 | Productivity |

## More apps by e-skett Corp.

- [e-calcFree](https://appshunter.io/ios/app/e-calcfree/id591591892)
- [成金電卓](https://appshunter.io/ios/app/id614242437)
- [e-scope 3-in-1](https://appshunter.io/ios/app/e-scope-3-in-1/id660574048)
- [ロックスクリーンカレンダーメーカー(LSCメーカー)](https://appshunter.io/ios/app/lsc/id730807645)
- [e-Recorder](https://appshunter.io/ios/app/e-recorder/id828269993)

All apps by e-skett Corp.: https://appshunter.io/developer/591591895

---

*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 2026-08-22.*