# Fomcal

> Customizable calculator app for saving and reusing complex formulas. (iPhone/iPad app by NOBORU IMAI.)

- Source: https://appshunter.io/ios/app/fomcal/id954145664 (this page in markdown: same URL + `.md`)
- Developer: [NOBORU IMAI](https://appshunter.io/developer/896071356)
- Category: Productivity, Business
- Price: $1.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 12.0 · 6 MB
- Languages: American English, Japanese
- Released: 2015-01-02
- Data updated: 2026-06-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/fomcal/id954145664/reviews.md

## What is Fomcal?

Fomcal is a calculator to calculate quickly with formula inputted already.

Since you can register formulas used in daily routine by yourself, there is no need to search or to develop the dedicated calc app.

Moreover, Fomcal can be also available as a general function calculator pad (option).

Registered formula can be utilized as a function in the other formula or on the calcpad. And constants or variables can be used in these.

Fomcal can show descriptions and a figure, about formulas and variables.

In addition to the numeric functions such as trigonometric functions, you can also use the logical or comparison functions.

By describing separated multiple of a formula with a semicolon';', you will be able to calculate these at the same time.

Temporary variables are available in formula definition as followings.
exp) x=1;x+2
result) 3

You can try a parameter study with specifying an initial value, a incrementation and a repeat number.
The result can be exported as CSV data.

Following formulas are preset as samples.

・Hypotenuse of Right Triangle - Geometry
・Cross-sectional Performance of Rectangle - Mechanics of materials
・Roots of quadratic equation - Mathematics
・Compound interest calculation - Business
・Number of years to become N times with compound interest calculation

After purchase of "Enhancements (former Restriction Release)" with In-App purchase, you will be able to following functions.

・Export/import of formula data.
・A special numeric pad will be utilized for efficient inputting.
・Function calculator pad.
・Parameter study.

From Ver.3.3, "Extended Syntax" feature is available.
With $IF, $FOR, $WHILE or etc., branch or iterative operation is easily specified.

## Key features

- Save and reuse custom formulas
- Support for logical and comparison functions
- Parameter study for variable analysis
- Export results as CSV
- Optional enhanced numeric pad
- Extended syntax for branching and iteration

## Pricing and in-app purchases

Base price: $1.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Enhancements | $1.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/fomcal/id954145664/reviews.md

### 4/5 — 大変重宝しています

*2020-10-16, version 3.4*

先日、このアプリを見つけて早速DLしました。
機能などは、ほぼ期待通りで大変満足していますが、
計算結果で小数点第３位以下を四捨五入したい場合はどうするのでしょうか？
ご教授願えば幸いです。

### 4/5 — 大変重宝しています

*2020-04-26, version 3.4*

変数の一括消去ボタンがあれば大変助かります。アップデートで機能追加して頂けたら幸いです。

### 5/5 — 使い勝手はいいと思うが...

*2020-03-08, version 3.4*

公式を作ってから値を入れて計算しようとするとすぐ落ちる
また、公式中の変数や数字が関数として認識されることがある

<2020/3/8 追記>
変数を「v2」のような形で記載していることや、定義した定数を使っているのは計算時にアプリが落ちる原因でしょうか?

### 2/5 — ☆2つはもう少し

*2016-10-25, version 3.0*

使い始めています
電気関係の公式集を作っています
定義画面を編集(テキストの改変)出来るようにして欲しい
今は全体を削除して再入力しています
使い方が分からずアンインストールしようかとも思いました … (ヘルプ)が必要です
改善されれば☆5つ(すっごく良い)にもなり得るアプリだと思います
ps 定義画面の共有サイトがあると嬉しい

## Frequently asked questions about Fomcal

### What is Fomcal?

Fomcal is a calculator application that allows users to create, save, and reuse custom calculation formulas. It supports advanced functions, logical operations, and parameter studies, with an optional enhanced numeric pad for efficient input.

### What are the benefits of using Fomcal?

Users can save time by registering frequently used formulas, avoiding the need to re-enter them or search for dedicated apps. It also offers advanced features like parameter studies and the ability to export results as CSV data.

### Can I export my calculations from Fomcal?

Yes, Fomcal allows you to export your calculation results as CSV data. This feature is available after purchasing the 'Enhancements' in-app upgrade.

### Does Fomcal support complex mathematical operations?

Yes, Fomcal supports numeric functions such as trigonometric functions, as well as logical and comparison functions. It also allows for the creation of temporary variables within formulas.

### What is the 'Parameter Study' feature in Fomcal?

The 'Parameter Study' feature allows you to perform a parameter analysis by specifying an initial value, increment, and repeat number for your formulas. This is part of the 'Enhancements' in-app purchase.

### How often is Fomcal updated?

Fomcal was last updated on July 25, 2024, to version 3.5. Updates typically include new features, bug fixes, and performance improvements.

### What devices is Fomcal compatible with?

Fomcal is available for iPhone, iPad, and iPod. It requires iOS 4+ and is rated for ages 4 and up.

### Does Fomcal have ads?

No, Fomcal does not contain advertisements. The app is free to download and offers additional features through a one-time in-app purchase.

## Version history (last 5 releases)

### 3.5 — 2024-07-25

Technical maintenance

### 3.4 — 2018-06-30

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

iCloud Drive supported (option)
iPhone X supported

### 3.3 — 2017-08-05

Extended syntax
Style specification in result field
Full screen editor for formula
Bug fixed.

### 3.2 — 2016-11-28

Array
Comment string output
Add functions (SWITCH,floor,round,fmod,ASize,ALevel)
Improvement of output of parameter studies.
Add samples.
Switching keyboards in formula definition field.
Improvement of screen view
Bug fixed.

### 3.1 — 2016-11-08

Formula group.
Copy/paste of formula definition.
Calculation in variable input field.
Improvement of display.
Bug fixed.

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All apps by NOBORU IMAI: https://appshunter.io/developer/896071356

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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 2026-06-25.*