# Number Converter — Convert binary, octal and hex

> Converts numbers between decimal, binary, octal, and hexadecimal bases. (iPhone/iPad app by Reefwing Software.)

- Source: https://appshunter.io/ios/app/number-converter/id380921203 (this page in markdown: same URL + `.md`)
- Developer: [Reefwing Software](https://appshunter.io/developer/356051743)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 3 MB
- Languages: American English
- Released: 2010-07-13
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/number-converter/id380921203/reviews.md

## What is Number Converter?

NumCon allows you to convert numbers into different bases. Simply enter a number and the application will show you the corresponding number in the new base when that button is pressed.

Supported bases are:

 - Decimal (Base 10);
 - Binary (Base 2);
 - Octal (Base 8); and
 - Hexadecimal (Base 16).

Note that NumCon will only allow you to enter valid digits for the selected base. For example, while entering binary only "1" and "0" will be enabled on the numeric keypad.

Version 3.1 allows a maximum value of 268,435,455 (decimal) to be entered and converted. If we receive feedback that this is too low then the limit will be increased.

## Key features

- Decimal conversion
- Binary conversion
- Octal conversion
- Hexadecimal conversion
- Valid digit input restriction
- Maximum value limit

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Calculator Functions | $0.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/number-converter/id380921203/reviews.md

### 5/5 — Fast and light

*2021-10-13*

Really nice and small in size app, do the job with no problems and with a nice interface.

One thing to ask the developer:
I’d like to see a counting feature, like if i type a certain number in whatever system i can go  one number higher or one lower.

Also addition and subtraction would also be nice.

### 5/5 — I like it

*2016-03-03*

I wanted this app when I was studying CS.

### 5/5 — Work great

*2011-11-21*

Works great and super easy to use

### 4/5 — Solid!

*2011-05-12*

Awesome, convenient app. Buttons could be bigger, however, the layout functions well. Also should have included basic calculator functions, and not add ons to purchase.

### 1/5 — Change it back!

*2010-11-02*

It was better on the original version, the buttons are small and there's no more ASCII conversion or chart. That's the main reason I got the app. I'm deleting and putting the original version stored on my computer back on.

### 4/5 — Does the job

*2010-09-06*

As the title says, does the job. Handy app for anyone doing computer mathematics.

### 3/5 — Needs work

*2010-07-14*

Great idea but needs some work. Bases 10,2 and 8 don't have a "Done" button. 16 bit limit would be nice.  How about digit grouping. 2's complement would be great. I do lots of conversion at work. If these issues get solved, I would use this app from now on because it's faster than using a calculator. 

## Frequently asked questions about Number Converter

### What number bases does Number Converter support?

Number Converter supports four bases: Decimal (Base 10), Binary (Base 2), Octal (Base 8), and Hexadecimal (Base 16). This allows for comprehensive number system conversions.

### How does Number Converter ensure accurate input?

The application restricts input to only valid digits for the selected base. For instance, when converting to binary, only '0' and '1' will be enabled on the keypad.

### What is the maximum value that can be converted in Number Converter?

The current version, 3.1, allows a maximum decimal value of 268,435,455 to be entered and converted. The developers are open to increasing this limit based on user feedback.

### Is Number Converter available on Android devices?

Based on the provided data, Number Converter is supported on iPhone and iPod. Information regarding Android compatibility is not available.

### How often is Number Converter updated?

The latest version, 3.1, was released on January 6, 2020. While this indicates a past update, the frequency of future updates is not specified.

### What is the user rating for Number Converter?

Number Converter has an excellent rating of 5.0 stars based on 2 reviews. This suggests a very positive user experience among its current users.

### Does Number Converter have ads?

No, Number Converter does not contain advertisements. The app is free to use without any ad interruptions.

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

Number Converter has an age rating of 4+. This means it is suitable for children aged 4 and above, indicating it contains no mature content.

## Version history (last 4 releases)

### 3.1 — 2020-01-06

Updated for iOS 12+

### 3.0 — 2015-07-28

Updated for iOS 8 and fixes for some bugs associated with in app purchasing of the pro functionality.

### 2.0 — 2010-10-29

- The user interface has been greatly improved and now matches the Pro version of Number Converter.

- Advertising has been removed.

- Maximum number to convert has been changed from 250,000 to 268,435,455 (decimal).

- Number keys are now always available and may be converted instantly into binary, octal, decimal or hexadecimal using the BIN, OCT, DEC and HEX buttons.

- The store button will bring up a page where you can instantly upgrade to the Pro version via In App purchasing.

### 1.0 — 2010-07-13

No release notes.

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All apps by Reefwing Software: https://appshunter.io/developer/356051743

## Related topics

[number converter](https://appshunter.io/ios/topics/number-converter) · [decimal to hex converter](https://appshunter.io/ios/topics/decimal-to-hex-converter)

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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.*