# ABC cloud vs Operation Calculus

The clearest difference is price: Operation Calculus at Free against ABC cloud's $0.99. Operation Calculus also leads on device support (3 vs 1) and iOS requirement (8.0 vs 13.0). On ads and in-app purchases there is nothing between them.

Operation Calculus is free to download; ABC cloud costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | ABC cloud | Operation Calculus |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/abc-cloud/id396335930/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 9 MB | 27 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CROMBEZ Emmanuel](https://appshunter.io/developer/375656695) | [RX Labz](https://appshunter.io/developer/1223459761) |

## What reviewers say

### ABC cloud

[App page](https://appshunter.io/ios/app/abc-cloud/id396335930)

This app helps young children learn to recognize letters through interactive play. It offers a simple, engaging way for kids to develop early literacy skills.

**Highlights:** Letter recognition games, Interactive play, Early literacy development, Kid-friendly interface

**In-app purchases:** none


### Operation Calculus

[App page](https://appshunter.io/ios/app/operation-calculus/id1461707284)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ABC cloud free?

ABC cloud costs $0.99, with no in-app purchases.

### Is Operation Calculus free?

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

### Do ABC cloud or Operation Calculus have ads?

Neither ABC cloud nor Operation Calculus shows ads.

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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.*