# Dev Calc Pro (Hex Dec Oct Bin) vs eco検定 | 2026年対策問題

The clearest difference is update cadence: eco検定 | 2026年対策問題 at fortnightly against Dev Calc Pro (Hex Dec Oct Bin)'s every 7 months. eco検定 | 2026年対策問題 also leads on price ($1.99 vs $2.99). Dev Calc Pro (Hex Dec Oct Bin)'s advantage is iOS requirement (8.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Dev Calc Pro (Hex Dec Oct Bin) costs $2.99 and eco検定 | 2026年対策問題 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, eco検定 | 2026年対策問題 fortnightly. The most recent releases landed on September 19, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Dev Calc Pro (Hex Dec Oct Bin) | eco検定 | 2026年対策問題 |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 6 MB | 6 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [QQ TSUBASA](https://appshunter.io/developer/568750169) | [Masaki Kobayashi](https://appshunter.io/developer/1882180437) |

## 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


### eco検定 | 2026年対策問題

[App page](https://appshunter.io/ios/app/eco-2026/id6769792021)

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

**In-app purchases:** none


## 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 eco検定 | 2026年対策問題 free?

eco検定 | 2026年対策問題 costs $1.99, with no in-app purchases.

### Do Dev Calc Pro (Hex Dec Oct Bin) or eco検定 | 2026年対策問題 have ads?

Neither Dev Calc Pro (Hex Dec Oct Bin) nor eco検定 | 2026年対策問題 shows ads.

### Which is updated more often, Dev Calc Pro (Hex Dec Oct Bin) or eco検定 | 2026年対策問題?

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, and eco検定 | 2026年対策問題 fortnightly. Most recently, Dev Calc Pro (Hex Dec Oct Bin) was updated on September 19, 2026 and eco検定 | 2026年対策問題 on September 23, 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.*