# CiiCalculator vs PETRA VMS

The clearest difference is iOS requirement: CiiCalculator at 11.0 against PETRA VMS's 15.1. 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 | CiiCalculator | PETRA VMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 41 MB | 37 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OLEKSANDR IZERGIN](https://appshunter.io/developer/1678396126) | [Talent Factori Private Limited](https://appshunter.io/developer/1600890333) |

## What reviewers say

### CiiCalculator

[App page](https://appshunter.io/ios/app/ciicalculator/id6466826300)

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

**In-app purchases:** none


### PETRA VMS

[App page](https://appshunter.io/ios/app/petra-vms/id6759030610)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CiiCalculator free?

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

### Is PETRA VMS free?

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

### Do CiiCalculator or PETRA VMS have ads?

Neither CiiCalculator nor PETRA VMS 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.*