# Dev Calc Pro (Hex Dec Oct Bin) vs AVR Tutorial Pro

The clearest difference is in-app purchases: Dev Calc Pro (Hex Dec Oct Bin) at none against AVR Tutorial Pro's 10. AVR Tutorial Pro's advantage is price ($1.99 vs $2.99). On update cadence, ads, device support and iOS requirement there is nothing between them.

Dev Calc Pro (Hex Dec Oct Bin) costs $2.99 and AVR Tutorial Pro $1.99 up front. AVR Tutorial Pro sells 10 one-off in-app purchases. Dev Calc Pro (Hex Dec Oct Bin) asks for nothing beyond the download.

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, AVR Tutorial Pro every 4 months. The most recent releases landed on July 18, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | Dev Calc Pro (Hex Dec Oct Bin) | AVR Tutorial Pro |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Paid | — |
| Size | 6 MB | 33 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [QQ TSUBASA](https://appshunter.io/developer/568750169) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## 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


### AVR Tutorial Pro

[App page](https://appshunter.io/ios/app/avr-tutorial-pro/id1066643368)

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SPI OLED | $1.99 | one-time |
| Wifi home automation | $1.99 | one-time |
| I2C OLED | $1.99 | one-time |
| 2.2" TFT | $1.99 | one-time |
| Lora home automation | $1.99 | one-time |
| gps project | $2.99 | one-time |
| Home automation using Siri | $2.99 | one-time |
| Home automation using Google | $2.99 | one-time |
| BT home automation | $4.99 | one-time |
| BLE home automation | $4.99 | 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 AVR Tutorial Pro free?

AVR Tutorial Pro costs $1.99, and also offers in-app purchases.

### Do Dev Calc Pro (Hex Dec Oct Bin) or AVR Tutorial Pro have ads?

Neither Dev Calc Pro (Hex Dec Oct Bin) nor AVR Tutorial Pro shows ads.

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

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, and AVR Tutorial Pro every 4 months. Most recently, Dev Calc Pro (Hex Dec Oct Bin) was updated on July 18, 2026 and AVR Tutorial Pro on August 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.*