# Dev Calc Pro (Hex Dec Oct Bin) vs Smart Convert

The clearest difference is price: Smart Convert at Free against Dev Calc Pro (Hex Dec Oct Bin)'s $2.99. Smart Convert also leads on update cadence (every 3 weeks vs every 7 months). Dev Calc Pro (Hex Dec Oct Bin)'s advantage is rating (3.5 vs 3.0) and in-app purchases (none vs 1). On ratings volume and device support there is nothing between them.

Smart Convert is free to download; Dev Calc Pro (Hex Dec Oct Bin) costs $2.99 up front. Smart Convert sells 1 one-off in-app purchase. Dev Calc Pro (Hex Dec Oct Bin) asks for nothing beyond the download.

Dev Calc Pro (Hex Dec Oct Bin) holds the better App Store score, 3.5 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, Smart Convert every 3 weeks. The most recent releases landed on July 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Dev Calc Pro (Hex Dec Oct Bin) | Smart Convert |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/smart-convert-base-converter/id6450381653/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 4 MB |
| Requires iOS | **8.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [QQ TSUBASA](https://appshunter.io/developer/568750169) | [Koya Nambo](https://appshunter.io/developer/1633778504) |

## What reviewers say

### Dev Calc Pro (Hex Dec Oct Bin)

[App page](https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609)

This app converts numbers between binary, octal, decimal, and hexadecimal bases on a single screen. It also displays color hex codes and RGB values. It is designed for developers and does not include scientific or unit conversion functions.

**Highlights:** Binary, octal, decimal, hexadecimal conversion, Color hex code and RGB display, Large 19-digit decimal display, Conversion reset toggle, No ads (Pro Version)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Smart Convert

[App page](https://appshunter.io/ios/app/smart-convert-base-converter/id6450381653)

Easily switch numbers between various bases, from binary to base 62. Ideal for developers, students, and math enthusiasts needing quick and reliable conversions with fractional parts. Features include instant common base conversions, custom base support, and conversion history.

**Highlights:** Convert between bases 2 to 62, Quick mode for common bases, Custom mode for any base pair, Save and recall conversion history, Support for fractional numbers, Light and dark themes, Localized in 9 languages

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $2.99 | one-time |


## Frequently asked questions

### Is Dev Calc Pro (Hex Dec Oct Bin) free?

Dev Calc Pro (Hex Dec Oct Bin) costs $2.99, with no in-app purchases.

### Is Smart Convert free?

Smart Convert is free to download, with in-app purchases available.

### Which has better reviews, Dev Calc Pro (Hex Dec Oct Bin) or Smart Convert?

Dev Calc Pro (Hex Dec Oct Bin) is rated higher. Dev Calc Pro (Hex Dec Oct Bin) averages 3.5 out of 5 from 2 ratings, while Smart Convert averages 3.0 from 2 ratings.

### Do Dev Calc Pro (Hex Dec Oct Bin) or Smart Convert have ads?

Smart Convert shows ads; Dev Calc Pro (Hex Dec Oct Bin) does not.

### Which is updated more often, Dev Calc Pro (Hex Dec Oct Bin) or Smart Convert?

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, and Smart Convert every 3 weeks. Most recently, Dev Calc Pro (Hex Dec Oct Bin) was updated on July 18, 2026 and Smart Convert on September 22, 2026.

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