# Engineering Converter Best vs Sirius.kz

Engineering Converter Best and Sirius.kz are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Engineering Converter Best | Sirius.kz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 13 MB | 72 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Dmitry Voynov](https://appshunter.io/developer/1650634070) | [aibolat kulatay](https://appshunter.io/developer/1393985588) |

## What reviewers say

### Engineering Converter Best

[App page](https://appshunter.io/ios/app/engineering-converter-best/id6502560237)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sirius.kz

[App page](https://appshunter.io/ios/app/siriuskz/id6747736990)

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

**In-app purchases:** none


## Frequently asked questions

### Is Engineering Converter Best free?

Engineering Converter Best is free to download, with no in-app purchases.

### Is Sirius.kz free?

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

### Do Engineering Converter Best or Sirius.kz have ads?

Neither Engineering Converter Best nor Sirius.kz 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.*