# ZMark vs GT Scientific Calculator

The clearest difference is iOS requirement: ZMark at 12.0 against GT Scientific Calculator's 14.0. 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.

## The numbers

| Metric | ZMark | GT Scientific Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 47 MB | 60 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Abdul Rafeeque Parakkal](https://appshunter.io/developer/1464562964) | [faiza zulfiqar](https://appshunter.io/developer/1856518456) |

## What reviewers say

### ZMark

[App page](https://appshunter.io/ios/app/zmark/id6476126478)

**In-app purchases:** none


### GT Scientific Calculator

[App page](https://appshunter.io/ios/app/gt-scientific-calculator/id6761824809)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZMark free?

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

### Is GT Scientific Calculator free?

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

### Do ZMark or GT Scientific Calculator have ads?

Neither ZMark nor GT Scientific 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.*