# Calc Engine vs Controller for AVR

The clearest difference is in-app purchases: Controller for AVR at none against Calc Engine's 1. Controller for AVR also leads on iOS requirement (13.0 vs 18). Calc Engine's advantage is device support. On price there is nothing between them.

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

## The numbers

| Metric | Calc Engine | Controller for AVR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calc-engine/id1061766849/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Daily | — |
| Monetization | Free | — |
| Size | 17 MB | 4 MB |
| Requires iOS | 18 | **13.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | — |
| Age rating | 4+ | 4+ |
| Developer | [VersaEdge Software, LLC](https://appshunter.io/developer/301294952) | [Sophisticated Engineering UG (haftungsbeschrankt)](https://appshunter.io/developer/1439958289) |

## 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 |


### Controller for AVR

[App page](https://appshunter.io/ios/app/controller-for-avr-net-io/id1559122156)

**In-app purchases:** none


## Frequently asked questions

### Is Calc Engine free?

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

### Is Controller for AVR free?

Controller for AVR is free to download, with no in-app purchases.

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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.*