# Calculator 3D vs Robust

The clearest difference is in-app purchases: Robust at none against Calculator 3D's 1. Robust also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Calculator 3D sells 1 one-off in-app purchase. Robust asks for nothing beyond the download.

## The numbers

| Metric | Calculator 3D | Robust |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/calculator-3d/id879830848/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 181 MB | 53 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [潇 罗](https://appshunter.io/developer/733259316) |

## What reviewers say

### Calculator 3D

[App page](https://appshunter.io/ios/app/calculator-3d/id879830848)

This utility app offers a unique calculator experience with animated characters presenting results. Enjoy interactive features like swiping to change backgrounds and reset numbers, all enhanced by atmospheric sounds. It's a fun and colorful way to perform calculations.

**Highlights:** Animated character results, Swipe gestures for background/reset, Atmospheric sound effects, Interactive animations based on result size, Customizable background colors

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad | $0.99 | one-time |


### Robust

[App page](https://appshunter.io/ios/app/robust/id6471950017)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator 3D free?

Calculator 3D is free to download, with in-app purchases available.

### Is Robust free?

Robust is free to download, with no in-app purchases.

### Do Calculator 3D or Robust have ads?

Calculator 3D shows ads; Robust does not.

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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.*