# Easy to use calculator — Vertical input calculator

> Vertical input calculator (iPhone/iPad app by youji okamura.)

- Source: https://appshunter.io/ios/app/easy-to-use-calculator/id965241193 (this page in markdown: same URL + `.md`)
- Developer: [youji okamura](https://appshunter.io/developer/834016142)
- Category: Utilities, Productivity
- Price: $0.99
- Age rating: 4+
- Requires: iOS 12.0 · 1 MB
- Languages: American English
- Released: 2015-02-18
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/easy-to-use-calculator/id965241193/reviews.md

## What is Easy to use calculator?

This calculator app allows you to save calculation formulas.

— Have you ever mistakenly closed an app after calculating something, been unable to remember a formula, or made a mistake when calculating large numbers?
・You can make changes at any time or start over if you make a calculation error midway through.
・Save your work with the Save button before closing the app.
・You can title your formulas.

— When you look at the list of saved information, you can immediately identify your calculations.
・The app features simple screens and is easy to operate.

— The save function is convenient for other usages in addition to calculations.
・Keep a log of your body weight
・Record your blood pressure, etc.


[How to use]
1. enter a formula like a normal calculator
2. "+" or "-" ② automatically each time you enter a symbol, such as, and then proceed to enter the ③ ···
3. Tap the "=" When you finish entering the formula! Calculation results appears at the top of the screen.
4. change to the calculation results are displayed "=" is "registration" button! You can save the calculation result.
5. Save is easy! You can register by simply entering the registered name

In the case of input mistake, click the selection after the C button ⑩ from ①
List button in the calculation registration list is displayed, it can be set to the calculator
You can also re-calculation.


## Version history (last 5 releases)

### Version 2.1.2 — 2026-08-29

- Added support for calculations with parentheses.
- Added the ability to add more calculation rows.
- Improved saving calculations with titles.
- Improved the registered calculation list.
- Improved button layout and overall usability.

### 2.1.1 — 2021-02-26

Fixed a calculation bug.

### 2.1 — 2018-08-20

Modification of part design

### 2.0 — 2016-05-26

Renew the calculation method ! Closer to the calculator operation feeling !
Design is also new , easy-to-understand easy to see !

### 1.0 — 2015-02-16

No release notes.

## Apps similar to Easy to use calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Lazy Tape](https://appshunter.io/ios/app/lazy-tape/id1315016023) | 4.2 (59) | Free | Utilities |
| [Accurate Builder Calculator - Free Measuring Concrete, Roofing, Joist, Stair and More](https://appshunter.io/ios/app/accurate-builder-calculator-free-measuring-concrete-roofing-joist-stair-and-more/id875841544) | 2.7 (11) | Free | Utilities |
| [E - Easy Measure](https://appshunter.io/ios/app/e-easy-measure/id1180585215) | 1.0 (1) | Free | Utilities |
| [Revit Tools](https://appshunter.io/ios/app/revit-tools/id1506538624) | 5.0 (1) | Free | Utilities |
| [Geosensors](https://appshunter.io/ios/app/geosensors/id1162783006) | 5.0 (1) | Free | Utilities |
| [SuperSurv](https://appshunter.io/ios/app/supersurv/id734191604) | 5.0 (1) | Free | Utilities |

## More apps by youji okamura

- [Calculate area on three sides](https://appshunter.io/ios/app/calculate-area-on-three-sides/id834019680)
- [surveying height calculation](https://appshunter.io/ios/app/surveying-height-calculation/id954160537)
- [測量 座標計算](https://appshunter.io/ios/app/id989856065)
- [EnglishRock！](https://appshunter.io/ios/app/englishrock/id1433908275)
- [SurveyCalculation](https://appshunter.io/ios/app/surveycalculation/id1445264027)

All apps by youji okamura: https://appshunter.io/developer/834016142

---

*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 2026-08-31.*