# Janus Calculator vs Mr.CalCul

The clearest difference is update cadence: Mr.CalCul at every 3 months against Janus Calculator's every 45 months. Mr.CalCul also leads on iOS requirement (10.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Janus Calculator ships an update every 45 months, Mr.CalCul every 3 months. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Janus Calculator | Mr.CalCul |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/janus-calculator/id373378721/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 1 MB | 27 MB |
| Requires iOS | 26.2 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Geoffrey Domm](https://appshunter.io/developer/373378724) | [WonderfulCode](https://appshunter.io/developer/545115773) |

## What reviewers say

### Janus Calculator

[App page](https://appshunter.io/ios/app/janus-calculator/id373378721)

This app offers a unique dual-calculator interface, supporting both standard and Reverse Polish Notation. It features programmable functions, extensive scientific and financial tools, and includes physical constants and an advanced option calculator.

**Highlights:** Dual calculator interface (Standard and RPN), Programmable functions, Finance and scientific functions, Physical constants, Black-Scholes option calculator, Implied value calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### Mr.CalCul

[App page](https://appshunter.io/ios/app/mrcalcul/id977008684)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Janus Calculator free?

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

### Is Mr.CalCul free?

Mr.CalCul is free to download, with no in-app purchases.

### Do Janus Calculator or Mr.CalCul have ads?

Neither Janus Calculator nor Mr.CalCul shows ads.

### Which is updated more often, Janus Calculator or Mr.CalCul?

Janus Calculator ships an update every 45 months, and Mr.CalCul every 3 months. Most recently, Janus Calculator was updated on October 21, 2026 and Mr.CalCul on October 12, 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.*