# Calc Engine vs Gradation Calculator

The clearest difference is in-app purchases: Gradation Calculator at none against Calc Engine's 1. Calc Engine's advantage is device support (4 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Calc Engine sells 1 one-off in-app purchase. Gradation Calculator asks for nothing beyond the download.

## The numbers

| Metric | Calc Engine | Gradation Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/calc-engine/id1061766849/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Daily | — |
| Monetization | Free | — |
| Size | 17 MB | 6 MB |
| Requires iOS | **18** | 18.2 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [VersaEdge Software, LLC](https://appshunter.io/developer/301294952) | [MASATO MISAWA](https://appshunter.io/developer/1609449895) |

## What reviewers say

### Calc Engine

[App page](https://appshunter.io/ios/app/calc-engine/id1061766849)

A highly customizable calculator with advanced features like graphing, equation solving, and unit conversion. Design your own keyboards and functions to streamline your workflow across Apple devices.

**Highlights:** Customizable keyboard layouts, User-defined functions and constants, Live equation graphing, Equation solving, Extensive unit conversions, Programmer mode (hex, binary, octal), Cross-device syncing

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc Engine+ | $9.99 | one-time |


### Gradation Calculator

[App page](https://appshunter.io/ios/app/gradation-calculator/id6777311428)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calc Engine free?

Calc Engine is free to download, with in-app purchases available.

### Is Gradation Calculator free?

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

### Do Calc Engine or Gradation Calculator have ads?

Neither Calc Engine nor Gradation Calculator 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.*