# 01Converter

> Number system converter with bitwise and arithmetic functions. (iPhone/iPad app by Francesco Burelli.)

- Source: https://appshunter.io/ios/app/01converter/id334626954 (this page in markdown: same URL + `.md`)
- Developer: [Francesco Burelli](https://appshunter.io/developer/334626957)
- Category: Productivity, Utilities
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings · 18 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.1 · 11 MB
- Languages: American English
- Released: 2009-10-14
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/01converter/id334626954/reviews.md

## What is 01Converter?

Convert number in binary, hexadecimal, octal, decimal and unicode!
Shift left, shift right, add 1 and subtract 1 functions.

Simple and straightforward. Optimized keyboard for writing binary, octal, decimal and hexadecimal.

## Key features

- Number system conversion (binary, hex, octal, decimal)
- Unicode conversion
- Shift left function
- Shift right function
- Add 1 function
- Subtract 1 function

## Recent user reviews (10 of 18)

All indexed reviews: https://appshunter.io/ios/app/01converter/id334626954/reviews.md

### 5/5 — Perfectly simple

*2016-11-14*

I'm a software developer. I need to manually convert roughly 20 hard-coded hex values into decimal. This simple app is perfect for this task.

### 4/5 — Extremely useful

*2016-03-15*

I love the simple conversion between binary, hex, and Unicode. The only thing I'd love to see is the ability to enter multiple hex inputs to faster change to Unicode. My lil brother and I use this to send messages because everyone else we know is to lazy to look up hex.🖖🏻

### 5/5 — Great

*2012-11-03*

Helped a lot with assassins creed

### 5/5 — Wow

*2012-02-11, version 2.1*

Really great. It works.

### 1/5 — It's gay

*2012-01-31*

It's gay

### 5/5 — 👍👍👍👍👍

*2011-11-21*

Best binary app ever❕❕❕😄😄

### 5/5 — Very nice

*2011-11-17*

And it's FREEEEEEEEEE

### 5/5 — Great update

*2011-10-22*

Love the new hex conversion really helpful 
But I am not sure how to use the acistring converter. I apologies for my occurring noobieness

### 5/5 — 

*2011-10-11*

this app is what i was looking for and its free perfect its got copy paste an all that I love it!

### 5/5 — Awesome app!

*2011-09-22*

This is a great app but can you please add the option to paste binary?

## Frequently asked questions about 01Converter

### What number systems can 01Converter convert between?

01Converter can convert numbers between binary, hexadecimal, octal, and decimal systems. It also supports Unicode conversion.

### Does 01Converter have ads?

No, 01Converter is ad-free, providing an uninterrupted user experience.

### What are the additional functions in 01Converter?

Beyond conversions, 01Converter includes functions for shifting bits left and right, as well as adding or subtracting one from a number.

### What devices is 01Converter available on?

01Converter is available for iPhone and iPod devices.

### How often is 01Converter updated?

The latest version, 3.0, was released on November 20, 2015. Updates may vary in frequency.

### What is the age rating for 01Converter?

01Converter has an age rating of 4+, making it suitable for a wide range of users.

### What is the user sentiment for 01Converter based on ratings?

Based on the available data, 01Converter has a high rating of 4.5 stars from 2 ratings, indicating positive user reception.

### Is 01Converter free to use?

Yes, 01Converter is available for free, with no cost to download or use its features.

## Version history (last 5 releases)

### 3.0 — 2015-11-20

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

• new skin
• shift left/right, plus 1 and subtract 1 operators added
• string conversion removed

### 2.1 — 2011-11-15

- octal conversion
- better interface

### 2.0 — 2011-10-22

- new design
- hex conversion
- unicode conversion
- copy and paste improved
- retina display

SHAKE your device to change view

### 1.2 — 2010-07-21

- new graphics;
- bugs fixed.

### 1.1 — 2009-11-05

- Convert ASCII strings optimized;
- Added the conversion from binary to ASCII string or integer.

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## More apps by Francesco Burelli

- [FullControl: Remote for Mac](https://appshunter.io/ios/app/fullcontrol-remote-for-mac/id347857890)

All apps by Francesco Burelli: https://appshunter.io/developer/334626957

## Related topics

[01converter](https://appshunter.io/ios/topics/01converter) · [binaries included](https://appshunter.io/ios/topics/binaries-included) · [bitwise solutions limited](https://appshunter.io/ios/topics/bitwise-solutions-limited) · [binify](https://appshunter.io/ios/topics/binify)

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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 2026-06-05.*