# Binary Decimal Converter vs Big Number Calculator+

The clearest difference is review sentiment: Binary Decimal Converter at 67% against Big Number Calculator+'s 0%. Binary Decimal Converter also leads on rating (4.9 vs 3.7) and ratings volume (68 vs 3). Big Number Calculator+'s advantage is in-app purchases (none vs 2) and update cadence (every 4 months vs every 25 months). On price, ads and device support there is nothing between them.

Both are free to download. Binary Decimal Converter sells 2 in-app purchases, starting at $0.99 per year. Big Number Calculator+ asks for nothing beyond the download.

Binary Decimal Converter holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: Binary Decimal Converter has 68 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 67% of Binary Decimal Converter's written reviews are positive against 0% of Big Number Calculator+'s.

Binary Decimal Converter ships an update every 25 months, Big Number Calculator+ every 4 months. The most recent releases landed on July 7, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Binary Decimal Converter | Big Number Calculator+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (68 ratings)](https://appshunter.io/ios/app/binary-decimal-converter/id1437860826/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/big-number-calculator-plus/id1541255205/reviews) |
| Number of ratings | **68** | 3 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 4 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 19 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Satish Boggarapu](https://appshunter.io/developer/1161292038) | [Kunio Takeuchi](https://appshunter.io/developer/851499887) |

## What reviewers say

### Binary Decimal Converter

[App page](https://appshunter.io/ios/app/binary-decimal-converter/id1437860826)

Easily convert numbers between Binary, Decimal, Hexadecimal, and Octal formats. This educational tool is designed for quick and accurate number system conversions.

**Highlights:** Binary conversion, Decimal conversion, Hexadecimal conversion, Octal conversion, Number system tool

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version - 1 YEAR | $0.99 | per year |
| Premium Version | $1.99 | one-time |


### Big Number Calculator+

[App page](https://appshunter.io/ios/app/big-number-calculator-plus/id1541255205)

Perform calculations with extremely large numbers, up to 66,000 digits. Supports addition, subtraction, multiplication, and division, with options for different calculation engines and data input methods. Results can be saved and printed in formatted text files.

**Highlights:** Handles up to 66,000 digits, Addition, subtraction, multiplication, division, Selectable calculation engines (Swift, Objective-C), Load data from files (txt, rtf, rtfd), Automatic data formatting for printing and saving, Customizable number separators

**In-app purchases:** none


## Frequently asked questions

### Is Binary Decimal Converter free?

Binary Decimal Converter is free to download, with in-app purchases available.

### Is Big Number Calculator+ free?

Big Number Calculator+ is free to download, with no in-app purchases.

### Which has better reviews, Binary Decimal Converter or Big Number Calculator+?

Binary Decimal Converter is rated higher. Binary Decimal Converter averages 4.9 out of 5 from 68 ratings, while Big Number Calculator+ averages 3.7 from 3 ratings.

### Do Binary Decimal Converter or Big Number Calculator+ have ads?

Neither Binary Decimal Converter nor Big Number Calculator+ shows ads.

### Which is updated more often, Binary Decimal Converter or Big Number Calculator+?

Binary Decimal Converter ships an update every 25 months, and Big Number Calculator+ every 4 months. Most recently, Binary Decimal Converter was updated on July 7, 2026 and Big Number Calculator+ on June 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*