# Dev Calc Pro (Hex Dec Oct Bin) — Show all Base number

> Developer calculator for base number conversions and color codes. (iPhone/iPad app by QQ TSUBASA.)

- Source: https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609 (this page in markdown: same URL + `.md`)
- Developer: [QQ TSUBASA](https://appshunter.io/developer/568750169)
- Category: Education, Utilities
- Price: $2.99
- Rating: 3.50/5 from 2 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 6 MB
- Languages: American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2013-04-24
- Data updated: 2026-07-18
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609/reviews.md

## What is Dev Calc Pro (Hex Dec Oct Bin)?

The Calculator for Developer 
※What is for Pro Version:
No Ad & Full Screen

Developer Calc includes the following features: 
■ Binary, octal, decimal, and hexadecimal in one screen 
■ Color Hex code, RGB in one screen 
■ The maximum value : 0x0FFF FFFF FFFF FFFF 
■ The minimum value : 0xF000 0000 0000 0000 
■ The large 19-digit display of decimal 
■ Conversion reset ON/OFF 

The following features are not included: (Just For Simple) 
■ Scientific: trigonometric, hyperbolic, and logarithmic functions 
■ Conversion: length, area, volume, speed, weight, temperature; unit arithmetic

## Key features

- Binary, octal, decimal, hexadecimal conversion
- Color hex code and RGB display
- Large 19-digit decimal display
- Conversion reset toggle
- No ads (Pro Version)

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609/reviews.md

### 4/5 — 良いのですがiPadで横

*2018-04-07*

iPhoneで使う分には良いのですが、iPadで使う場合は横表示に対応して欲しいです。それとoctは必要ないので、ASCII文字の表示ができれば最高です。

### 1/5 — デバイスに対応していません

*2017-07-30*

アップデートで対応機種から外されました。まあ前のバージョンが使えるから問題無いが、一括バージョンアップのたびにメッセージが出るのは面倒

### 1/5 — 入力桁数

*2015-07-10*

HEXで F が３０桁も入力できてしまう。

### 4/5 — ペースト出来ない

*2014-08-28*

色のセンスがよく、機能も便利に使わせていただいてます。最大が64bitまで桁があるのがいい。ただ、ペーストが出来ないのが不満です。他の電卓の計算結果をペーストできればいいのに。

### 3/5 — iPhone5sで活用中。

*2013-10-01*

フルスクリーン表示で使いやすいです。
まあ、普通に。

### 1/5 — やられた

*2013-09-21*

ビット演算出来ねーじゃん。

### 5/5 — さいこー

*2013-06-14*

とても助かります。

## Frequently asked questions about Dev Calc Pro (Hex Dec Oct Bin)

### What is Dev Calc Pro?

Dev Calc Pro is a calculator application designed for developers that facilitates conversions between binary, octal, decimal, and hexadecimal number bases. It also displays color hex codes and RGB values on a single screen.

### What number bases does Dev Calc Pro support?

Dev Calc Pro supports binary, octal, decimal, and hexadecimal number bases. It can display all of these on one screen for easy comparison and conversion.

### Does Dev Calc Pro have ads?

No, Dev Calc Pro does not contain advertisements. The Pro version specifically offers an ad-free experience and full-screen display.

### What is the price of Dev Calc Pro?

Dev Calc Pro is available for a one-time purchase of $2.99. There are no subscription fees associated with its use.

### What devices is Dev Calc Pro compatible with?

Dev Calc Pro is compatible with iPhone, iPad, and iPod touch devices. It is designed for iOS operating systems.

### Does Dev Calc Pro include scientific functions?

No, Dev Calc Pro does not include scientific functions such as trigonometric, hyperbolic, or logarithmic calculations. It focuses solely on base number conversions and color code displays.

### How often is Dev Calc Pro updated?

The latest version of Dev Calc Pro is 2.2.10, which was last updated on August 26, 2025. Updates are released periodically to maintain functionality and compatibility.

### What is the age rating for Dev Calc Pro?

Dev Calc Pro has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

## Version history (last 5 releases)

### 2.2.10 — 2025-08-26

Fixed a little bug.

### 2.2.6 — 2021-06-10

Updated some UI.
Fixed some bugs.

### 2.2.2 — 2020-04-13

Updated some UI.

### 2.2.1 — 2020-03-02

Updated some UI.
Updated for iOS 13.

### 2.2.0 — 2017-07-20

New UI.
Change clear button to del button.
Paste function.

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All apps by QQ TSUBASA: https://appshunter.io/developer/568750169

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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 2026-07-18.*