# m/z vs Unit Converter Superior

The clearest difference is update cadence: m/z at every 5 weeks against Unit Converter Superior's every 21 months. m/z also leads on iOS requirement (6.0 vs 15.0). 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.

m/z ships an update every 5 weeks, Unit Converter Superior every 21 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | m/z | Unit Converter Superior |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (5 ratings)](https://appshunter.io/ios/app/mz/id1117272212/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 21 months |
| Monetization | Free | — |
| Size | 3.6 GB | 58 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kirill Blinov](https://appshunter.io/developer/630833420) | [Felix Peralta](https://appshunter.io/developer/1546086459) |

## What reviewers say

### m/z

[App page](https://appshunter.io/ios/app/mz/id1117272212)

Instantly search a vast database of chemical structures based on their exact mass. This tool helps identify compounds with masses under 340 Da, drawing from millions of entries.

**Highlights:** Find chemical structures by exact mass, Search database of known structures, Database includes over 35 million compounds, Supports masses under 340 Da, Utilizes PubChem compounds database

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter Superior

[App page](https://appshunter.io/ios/app/unit-converter-superior/id1630757981)

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

**In-app purchases:** none


## Frequently asked questions

### Is m/z free?

m/z is free to download, with no in-app purchases.

### Is Unit Converter Superior free?

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

### Do m/z or Unit Converter Superior have ads?

Neither m/z nor Unit Converter Superior shows ads.

### Which is updated more often, m/z or Unit Converter Superior?

m/z ships an update every 5 weeks, and Unit Converter Superior every 21 months. Most recently, m/z was updated on November 2, 2026 and Unit Converter Superior on October 30, 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.*