# Dev Calc Pro (Hex Dec Oct Bin) vs Polyhedra 3D

The clearest difference is rating: Polyhedra 3D at 5.0 against Dev Calc Pro (Hex Dec Oct Bin)'s 3.5. Polyhedra 3D also leads on review sentiment (75% vs 43%) and price ($1.99 vs $2.99). Dev Calc Pro (Hex Dec Oct Bin)'s advantage is iOS requirement (8.0 vs 16.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Dev Calc Pro (Hex Dec Oct Bin) costs $2.99 and Polyhedra 3D $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Polyhedra 3D holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 43% of Dev Calc Pro (Hex Dec Oct Bin)'s written reviews are positive against 75% of Polyhedra 3D's.

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, Polyhedra 3D every 4 months. The most recent releases landed on July 18, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Dev Calc Pro (Hex Dec Oct Bin) | Polyhedra 3D |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | [3.5 (2 ratings)](https://appshunter.io/ios/app/dev-calc-pro-hex-dec-oct-bin/id638232609/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/polyhedra-3d/id741648895/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 42.9% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Paid | Paid |
| Size | 6 MB | 2 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [QQ TSUBASA](https://appshunter.io/developer/568750169) | [Laurent Rodier](https://appshunter.io/developer/697920086) |

## 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


### Polyhedra 3D

[App page](https://appshunter.io/ios/app/polyhedra-3d/id741648895)

Explore and create intricate geometric shapes with ease. Apply various transformations and color schemes to generate unique visual designs. Experience your creations in augmented reality.

**Highlights:** Create and manipulate polyhedrons, Apply Conway's transformations, Thousands of visual combinations, Save as still or animated images, Augmented Reality experience, No math knowledge required

**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 Polyhedra 3D free?

Polyhedra 3D costs $1.99, with no in-app purchases.

### Which has better reviews, Dev Calc Pro (Hex Dec Oct Bin) or Polyhedra 3D?

Polyhedra 3D is rated higher. Dev Calc Pro (Hex Dec Oct Bin) averages 3.5 out of 5 from 2 ratings, while Polyhedra 3D averages 5.0 from 4 ratings.

### Do Dev Calc Pro (Hex Dec Oct Bin) or Polyhedra 3D have ads?

Neither Dev Calc Pro (Hex Dec Oct Bin) nor Polyhedra 3D shows ads.

### Which is updated more often, Dev Calc Pro (Hex Dec Oct Bin) or Polyhedra 3D?

Dev Calc Pro (Hex Dec Oct Bin) ships an update every 7 months, and Polyhedra 3D every 4 months. Most recently, Dev Calc Pro (Hex Dec Oct Bin) was updated on July 18, 2026 and Polyhedra 3D on September 6, 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.*