# DevCalc: Programmer Calculator — Hex, binary, bitwise, subnets

> Hex, binary, bitwise, subnets (iPhone/iPad app by Hiroyuki Aratame.)

- Source: https://appshunter.io/ios/app/devcalc-programmer-calculator/id6758245591 (this page in markdown: same URL + `.md`)
- Developer: [Hiroyuki Aratame](https://appshunter.io/developer/1869050831)
- Category: Developer Tools, Productivity
- Price: Free with in-app purchases (on sale, was $0.49)
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-02-06
- Data updated: 2026-10-24

## What is DevCalc?

A calculator for programmers. Type in HEX, DEC, OCT or BIN and the others update as you type.

WIDGETS (Pro)
Seven widgets for the Home and Lock Screen:
• Terminal: Unix time as $ date +%s prints it, with a live seconds counter and the days until the next round number
• Binary clock: the time in glowing binary dots
• Wi-Fi address: your IP, mask and network on the current Wi-Fi
• Unix time, UTC with ISO week, and the Year 2038 countdown
• Daily quiz: answer right on the widget

SHOW THE WORK
Open "Show the work" to see the division, place values, two's complement and the subnet mask AND, one line at a time. The Learn tab adds a conversion quiz, lessons and ASCII and subnet cheat sheets.

CONVERT FROM ANY APP
Select text anywhere, tap Share, then DevCalc to read it as hex, an IP address, Unix time, Base64 and more.

FEATURES
• Base conversion and arithmetic, 8/16/32/64-bit, signed view
• AND, OR, XOR, NOT, shifts and byte swap
• IPv4 subnet calculator with CIDR, host count and next subnet
• Units (KB/KiB, Hz, bit/s) and transfer time
• One-tap copy for every result
• Works on iPhone, iPad and Mac

Pro (one-time purchase, no subscription): widgets, encode and hash, Unix time conversion, bit editor, CAN ID (J1939) decoding, 100-entry history.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Developer Calc Pro | $2.99 | one-time |


## Is DevCalc safe?

Not enough ratings yet to assess DevCalc.

## Is DevCalc legit?

DevCalc: Programmer Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for DevCalc is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.5 — 2026-10-21

• Seven widgets: Terminal, Binary clock, Wi-Fi address, Unix time, UTC and ISO week, Daily quiz, Year 2038
• Learn tab with a quiz, lessons and cheat sheets
• Step-by-step working for conversions, two's complement and subnets
• Convert selected text from the share sheet
• Fold away the keypad
• Reorganized tabs and tools
• Now in 10 languages

### 1.4 — 2026-10-17

・Calcに履歴を追加（無料は直近10件、Proは最大100件）。タップするとその結果に戻れます
・Bitsにバイト順（エンディアン）の入れ替えを追加
・コピーボタンの長押しで、0x付き・区切り付き（0x1234_5678）の形式を選べるように
・押した演算ボタンが分かりやすくなりました
・無料版にバナー広告を表示します。Proを購入すると非表示になります

### 1.3 — 2026-10-12

・アプリが無料になりました（有料版を買った方はProの機能もそのまま使えます）
・エンコード・ハッシュ、Unix時間、ビット編集、CAN ID解析（J1939対応）を追加（Pro）
・8bit/16bit幅、Signed DEC、ASCIIの表示を追加
・通信速度の単位変換と転送時間の計算を追加
・前回の値や設定を覚えるようにしました
・iOS 17以降で使えるようになりました

### 1.1 — 2026-02-07

アプリ名変更　Rename

### 1.0 — 2026-02-04

No release notes.

## More apps by Hiroyuki Aratame

- [GraySNS](https://appshunter.io/ios/app/graysns/id6770747585)
- [Modosu - Repair Photo Notes](https://appshunter.io/ios/app/modosu-repair-photo-notes/id6809811274)

All apps by Hiroyuki Aratame: https://appshunter.io/developer/1869050831

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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 2026-10-24.*