# Datum — A programmer's calculator

> Programmer's calculator for encoding/decoding data types and bit manipulation. (iPhone/iPad app by John Diamond.)

- Source: https://appshunter.io/ios/app/datum/id1637946569 (this page in markdown: same URL + `.md`)
- Developer: [John Diamond](https://appshunter.io/developer/1637946571)
- Category: Utilities, Developer Tools
- Price: $2.99
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 14.4 · 1 MB
- Languages: English
- Released: 2022-08-06
- Data updated: 2026-07-19
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/datum/id1637946569/reviews.md

## What is Datum?

An essential calculator for low-level software engineers or firmware engineers.  Encodes and decodes integers, IEEE-754 floating point numbers, unix time stamps and IP addresses in 8/16/32/64 bits.  Display values and encoded representations in hexadecimal, decimal or binary.  Display encoding in little or big endian byte-order.  Capture values directly from your screen.  Toggle individual bits on or off.  Perform all major arithmetic, scientific and bit-manipulation functions.

## Key features

- Encode/decode integers, floats, timestamps, IP addresses
- Hexadecimal, decimal, binary display
- Little/big endian byte order
- Capture values from screen
- Toggle individual bits
- Arithmetic, scientific, bit-manipulation functions


## Frequently asked questions about Datum

### What data types can Datum encode and decode?

Datum can encode and decode integers, IEEE-754 floating-point numbers, Unix timestamps, and IP addresses. It supports these in 8, 16, 32, and 64-bit formats.

### What display formats does Datum offer?

Datum allows you to display values and their encoded representations in hexadecimal, decimal, or binary. It also supports little or big endian byte orders.

### Can Datum capture values directly from my screen?

Yes, Datum has a feature that allows you to capture values directly from your screen, streamlining the input process for engineers.

### What kind of operations can I perform with Datum?

Datum supports all major arithmetic, scientific, and bit-manipulation functions. You can also toggle individual bits on or off within the app.

### What devices is Datum compatible with?

Datum is available for iPhone, iPad, and iPod devices. It has an age rating of 4+.

### How much does Datum cost?

Datum is a paid application priced at $2.99. It does not feature in-app purchases or advertisements.

### How often is Datum updated?

Datum was last updated on February 8, 2023, with version 1.1.0. The initial release date was August 6, 2022.

### Does Datum have ads?

No, Datum does not contain advertisements. It is a paid utility app designed for programmers.

## Version history (last 5 releases)

### 1.1.0 — 2023-02-08

Live Capture mode reads values directly from your computer screen and decodes values instantly.

### 1.0.3 — 2022-10-03

When the user is in value mode, switching data type or data width will now convert the value in the input register to the new type/width.  To cast the value to a new type/width, switch to encoding mode and then change the type/width.

### 1.0.2 — 2022-09-22

Performance improvements for iOS 14.x and automatic font resizing for long numbers.

### 1.0.1 — 2022-08-29

Minor fixes to the UI rendering on iOS 14.

### 1.0 — 2022-08-06

No release notes.

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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 2026-07-19.*