# Calc Engine vs Megatuner Plus

The clearest difference is update cadence: Calc Engine at daily against Megatuner Plus's every 5 weeks. Calc Engine also leads on device support (4 vs 2). Megatuner Plus's advantage is iOS requirement (16.0 vs 18). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Calc Engine sells 1 one-off in-app purchase and Megatuner Plus sells 2 in-app purchases, starting at $4.49 per month. Whichever you choose, the download price is not the number that matters.

Calc Engine ships an update daily, Megatuner Plus every 5 weeks. The most recent releases landed on August 31, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Calc Engine | Megatuner Plus |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 5 weeks |
| Monetization | Free | — |
| Size | 17 MB | 1 MB |
| Requires iOS | 18 | **16.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [VersaEdge Software, LLC](https://appshunter.io/developer/301294952) | [Christer Dalen](https://appshunter.io/developer/1655576002) |

## 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 |


### Megatuner Plus

[App page](https://appshunter.io/ios/app/megatuner-plus/id1665781784)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Megatuner_Mimo Full | $4.49 | per month |
| Megatuner_Mimo Full | $44.90 | per year |


## Frequently asked questions

### Is Calc Engine free?

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

### Is Megatuner Plus free?

Megatuner Plus is free to download, with in-app purchases available.

### Do Calc Engine or Megatuner Plus have ads?

Neither Calc Engine nor Megatuner Plus shows ads.

### Which is updated more often, Calc Engine or Megatuner Plus?

Calc Engine ships an update daily, and Megatuner Plus every 5 weeks. Most recently, Calc Engine was updated on August 31, 2026 and Megatuner Plus on September 15, 2026.

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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.*