# Cal C vs ScreenMark

The clearest difference is device support: Cal C at 3 against ScreenMark's 1. Cal C also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Cal C ships an update every 10 days, ScreenMark every 9 days. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Cal C | ScreenMark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/cal-c-scientific-calculator/id6760196537/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | Free | — |
| Size | 35 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pinki .](https://appshunter.io/developer/1863734565) | [MUSTAFA CERIT](https://appshunter.io/developer/1895171007) |

## What reviewers say

### Cal C

[App page](https://appshunter.io/ios/app/cal-c-scientific-calculator/id6760196537)

This app consolidates numerous essential calculators into a single, user-friendly interface. It offers tools for scientific, financial, programmer, graphing, and statistical calculations, alongside unit and currency conversions. Solve equations, plot graphs, and manage bills without needing multiple applications.

**Highlights:** Comprehensive calculator suite, Unit and currency conversion, Equation solver, Graphing capabilities, Financial and programmer tools, History and favorites

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

**In-app purchases:** none


### ScreenMark

[App page](https://appshunter.io/ios/app/screenmark-remote-controller/id6776369714)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cal C free?

Cal C is free to download, with no in-app purchases.

### Is ScreenMark free?

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

### Do Cal C or ScreenMark have ads?

Neither Cal C nor ScreenMark shows ads.

### Which is updated more often, Cal C or ScreenMark?

Cal C ships an update every 10 days, and ScreenMark every 9 days. Most recently, Cal C was updated on October 16, 2026 and ScreenMark on October 6, 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.*