# 進数変換 vs Dev Calc

The clearest difference is in-app purchases: 進数変換 at none against Dev Calc's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Dev Calc sells 1 in-app purchase, starting at $1.99 per month. 進数変換 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 17, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | 進数変換 | Dev Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (2 ratings)](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 51 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [田中 俊多](https://appshunter.io/developer/1571627924) | [Toshiya Hondo](https://appshunter.io/developer/1571875732) |

## What reviewers say

### 進数変換

[App page](https://appshunter.io/ios/app/id1572348422)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dev Calc

[App page](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219)

This app assists developers and programmers with immediate numeric conversions between binary, octal, decimal, and hexadecimal formats. It also provides tools for generating color codes from RGB, HSL, and HSV values, with a color picker and preset options.

**Highlights:** Numeric conversion (Bin, Oct, Dec, Hex), Signed/Unsigned options, Adjustable bit sizes (8, 16, 32, 64), RGB, HSL, HSV color code generation, Color picker, Preset color options

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $1.99 | per month |


## Frequently asked questions

### Is 進数変換 free?

進数変換 is free to download, with no in-app purchases.

### Is Dev Calc free?

Dev Calc is free to download, with in-app purchases available.

### Do 進数変換 or Dev Calc have ads?

Both 進数変換 and Dev Calc show ads.

### Which is updated more often, 進数変換 or Dev Calc?

進数変換 ships an update every 2 months, and Dev Calc every 2 months. Most recently, 進数変換 was updated on September 17, 2026 and Dev Calc on June 4, 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.*