# Calculator Challenge vs Digit Invader Calculator

The clearest difference is in-app purchases: Digit Invader Calculator at none against Calculator Challenge's 1. Digit Invader Calculator also leads on ads (none vs shown). Calculator Challenge's advantage is iOS requirement (11.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Calculator Challenge sells 1 one-off in-app purchase. Digit Invader Calculator asks for nothing beyond the download.

## The numbers

| Metric | Calculator Challenge | Digit Invader Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (9 ratings)](https://appshunter.io/ios/app/digit-invader-calculator/id6743176325/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | — | Every 9 days |
| Monetization | — | Free |
| Size | 98 MB | 5 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Maysalward UK](https://appshunter.io/developer/1241753360) | [Daniel Fu Keung Kwan](https://appshunter.io/developer/1801804499) |

## What reviewers say

### Calculator Challenge

[App page](https://appshunter.io/ios/app/calculator-challenge/id1611345246)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### Digit Invader Calculator

[App page](https://appshunter.io/ios/app/digit-invader-calculator/id6743176325)

This app combines a functional calculator with a retro arcade game inspired by classic calculator interfaces. It offers automatic game saving, a high score list, and multitasking support on iPads. A scaled-down version is also available for Apple Watch.

**Highlights:** Retro calculator game, Basic calculator functions, Automatic game save, High score list, iPad Stage Manager support, Apple Watch version

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator Challenge free?

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

### Is Digit Invader Calculator free?

Digit Invader Calculator is free to download, with no in-app purchases.

### Do Calculator Challenge or Digit Invader Calculator have ads?

Calculator Challenge shows ads; Digit Invader Calculator 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.*