# Four Formula Calculator — Simultaneous, Root calculation

> Simultaneous, Root calculation (iPhone/iPad app by SHIGETO TAKAGI.)

- Source: https://appshunter.io/ios/app/four-formula-calculator/id523405542 (this page in markdown: same URL + `.md`)
- Developer: [SHIGETO TAKAGI](https://appshunter.io/developer/519611619)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 4 MB
- Languages: American English
- Released: 2012-05-06
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/four-formula-calculator/id523405542/reviews.md

## What is Four Formula Calculator?

A free calculator app that allows you to calculate while looking at 4 formulas at the same time. Root calculation is also possible with root(number) such as root(2).


## Version history (last 5 releases)

### 20201215 — 2020-12-18

dark mode.

### 20150610 — 2015-06-20

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

for iOS8.

### 20130607 — 2013-06-15

buttons added.

### 20121123 — 2012-11-29

bug fixed.

### 120922 — 2012-10-01

The addition by the space.

## Apps similar to Four Formula Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Calculator - CalcPro](https://appshunter.io/ios/app/calculator-calcpro/id1321874059) | 3.6 (9) | Free | Utilities |
| [Calculator 4.0](https://appshunter.io/ios/app/calculator-40/id6445965184) | 4.8 (53) | Free | Utilities |
| [PROG_CALC](https://appshunter.io/ios/app/prog-calc/id1640426491) | 5.0 (1) | Free | Utilities |
| [Cuspart: Calculator+](https://appshunter.io/ios/app/cuspart-calculator-plus/id1572084996) | — | Free | Utilities |
| [Calc Pro - Simple and Useful](https://appshunter.io/ios/app/calc-pro-simple-and-useful/id1444681142) | 4.8 (5) | Free | Utilities |
| [Double Calculator](https://appshunter.io/ios/app/double-calculator/id6503652862) | — | Free | Utilities |

## More apps by SHIGETO TAKAGI

- [Custom Holiday Calendar](https://appshunter.io/ios/app/custom-holiday-calendar/id524001198)
- [Easy Calculators with Cursors](https://appshunter.io/ios/app/easy-calculators-with-cursors/id526231336)
- [Dual Mail SNS Editors](https://appshunter.io/ios/app/dual-mail-sns-editors/id527102250)
- [Speedometer km/h Odometer](https://appshunter.io/ios/app/speedometer-kmh-odometer/id528218566)
- [2026〜2027年（令和8〜9年）友引年間カレンダー](https://appshunter.io/ios/app/2026202789/id529424779)

All apps by SHIGETO TAKAGI: https://appshunter.io/developer/519611619

## Related topics

[công thức Tính ROASt](https://appshunter.io/ios/topics/c-ng-th-c-t-nh-roast)

---

*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 2026-05-16.*