# Molecular Weight Calculator vs Conversions

The clearest difference is price: Conversions at Free against Molecular Weight Calculator's $2.99. Conversions also leads on update cadence (every 2 weeks vs every 29 months). Molecular Weight Calculator's advantage is device support (3 vs 1) and iOS requirement (13 vs 18.6). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Conversions is free to download; Molecular Weight Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Molecular Weight Calculator against 5.0 for Conversions. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

Molecular Weight Calculator ships an update every 29 months, Conversions every 2 weeks. The most recent releases landed on October 15, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Molecular Weight Calculator | Conversions |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/molecular-weight-calculator/id1444836038/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/conversions-unit-converter/id6741049598/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 6 MB |
| Requires iOS | **13** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Piotr Bakker](https://appshunter.io/developer/1741809059) |

## What reviewers say

### 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


### Conversions

[App page](https://appshunter.io/ios/app/conversions-unit-converter/id6741049598)

Easily convert over 100 units across various categories like temperature, length, and weight. View conversion formulas, copy results, and share them directly. Enjoy a private, ad-free experience with a native iOS design.

**Highlights:** Convert 100+ units, Temperature, length, weight conversions, View conversion formulas, Copy and share conversions, Native iOS design, Ad-free experience

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

**In-app purchases:** none


## Frequently asked questions

### Is Molecular Weight Calculator free?

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

### Is Conversions free?

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

### Which has better reviews, Molecular Weight Calculator or Conversions?

Molecular Weight Calculator and Conversions are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do Molecular Weight Calculator or Conversions have ads?

Neither Molecular Weight Calculator nor Conversions shows ads.

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

Molecular Weight Calculator ships an update every 29 months, and Conversions every 2 weeks. Most recently, Molecular Weight Calculator was updated on October 15, 2026 and Conversions on October 28, 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.*