# CNVRT vs SI Converter

The clearest difference is price: SI Converter at Free against CNVRT's $4.99. CNVRT's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On in-app purchases there is nothing between them.

SI Converter is free to download; CNVRT costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CNVRT ships an update every 2 weeks, SI Converter every 2 months. The most recent releases landed on September 18, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | CNVRT | SI Converter |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.5 (19 ratings)](https://appshunter.io/ios/app/cnvrt-si-unit-conversion-tool/id1607762263/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Paid | — |
| Size | 1 MB | 4 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pascal Andraos](https://appshunter.io/developer/1328885685) | [Ramon A. Marchante Castellanos](https://appshunter.io/developer/1735326162) |

## What reviewers say

### CNVRT

[App page](https://appshunter.io/ios/app/cnvrt-si-unit-conversion-tool/id1607762263)

Instantly convert over 200 units across 20 measurement categories, from weight and length to temperature and data storage. This tool simplifies metric and Imperial conversions for STEM professionals and everyday users alike.

**Highlights:** Over 200 units supported, 20 measurement categories, Instant conversions, Metric and Imperial units, Optimized for Apple devices, STEM and everyday use

**Features:** Vision Pro support

**In-app purchases:** none


### SI Converter

[App page](https://appshunter.io/ios/app/si-converter/id6504356195)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CNVRT free?

CNVRT costs $4.99, with no in-app purchases.

### Is SI Converter free?

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

### Do CNVRT or SI Converter have ads?

SI Converter shows ads; CNVRT does not.

### Which is updated more often, CNVRT or SI Converter?

CNVRT ships an update every 2 weeks, and SI Converter every 2 months. Most recently, CNVRT was updated on September 18, 2026 and SI Converter on May 16, 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.*