# Unit Converter vs Molecular Weight Calculator

The clearest difference is price: Unit Converter at Free against Molecular Weight Calculator's $2.99. Unit Converter also leads on update cadence (every 13 months vs every 29 months) and ratings volume (13 vs 3). Molecular Weight Calculator's advantage is in-app purchases (none vs 2) and ads (none vs shown). On rating and device support there is nothing between them.

Unit Converter is free to download; Molecular Weight Calculator costs $2.99 up front. Unit Converter sells 2 in-app purchases, starting at $4.99 per month. Molecular Weight Calculator asks for nothing beyond the download.

Molecular Weight Calculator holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 13 and 3 respectively.

Unit Converter ships an update every 13 months, Molecular Weight Calculator every 29 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Unit Converter | Molecular Weight Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.8 (13 ratings)](https://appshunter.io/ios/app/unit-converter/id1377049882/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/molecular-weight-calculator/id1444836038/reviews)** |
| Number of ratings | **13** | 3 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 13 months** | Every 29 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 50 MB | 1 MB |
| Requires iOS | 16.4 | **13** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [xNeat.com](https://appshunter.io/developer/327498295) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter/id1377049882)

This app offers a wide range of unit conversions for various measurements, from temperature to length. It features a user-friendly interface, customizable themes, and smart features that remember your frequent conversions. It also links to external apps for specialized tasks.

**Highlights:** Broad conversion spectrum, Personalizable themes, User-friendly interface, Smart features for frequent conversions, Links to specialized external apps

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unit Converter | $4.99 | per month |
| Unit Converter | $39.99 | per year |


### Molecular Weight Calculator

[App page](https://appshunter.io/ios/app/molecular-weight-calculator/id1444836038)

This tool calculates the average molecular weight of molecules using their chemical formulas. It offers instant results, supports high precision, and is optimized for everyday use on iOS devices. The app prioritizes user privacy and is ad-free.

**Highlights:** Instant molecular weight calculation, Copy results to other apps, Includes formula references, Supports up to 16 decimal places, Works on iPhone and iPad, Ad-free and privacy-focused

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter free?

Unit Converter is free to download, with in-app purchases available.

### Is Molecular Weight Calculator free?

Molecular Weight Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, Unit Converter or Molecular Weight Calculator?

Molecular Weight Calculator is rated higher. Unit Converter averages 4.8 out of 5 from 13 ratings, while Molecular Weight Calculator averages 5.0 from 3 ratings.

### Do Unit Converter or Molecular Weight Calculator have ads?

Unit Converter shows ads; Molecular Weight Calculator does not.

### Which is updated more often, Unit Converter or Molecular Weight Calculator?

Unit Converter ships an update every 13 months, and Molecular Weight Calculator every 29 months. Most recently, Unit Converter was updated on November 2, 2026 and Molecular Weight Calculator on November 2, 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.*