# ABC vs Operation Calculus

The clearest difference is price: Operation Calculus at Free against ABC's $2.99. 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 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | ABC | Operation Calculus |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Paid | — |
| Size | 16 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

[App page](https://appshunter.io/ios/app/abc-lettres-liees/id427425968)

This app guides children in learning cursive letter connections for fluid handwriting. It demonstrates correct strokes and finger movements, verifying the child's tracing accuracy. The app aligns with recommendations from the Belgian Group of Graphotherapists.

**Highlights:** Teaches cursive letter connections, Demonstrates correct tracing gestures, Verifies child's handwriting accuracy, Focuses on fluidity and continuity, Aligned with graphotherapy recommendations

**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 free?

ABC costs $2.99, with no in-app purchases.

### Is Operation Calculus free?

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

### Do ABC or Operation Calculus have ads?

Neither ABC nor Operation Calculus shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*