# Molecular Weight Calculator vs Plus42

The clearest difference is price: Molecular Weight Calculator at $2.99 against Plus42's $9.99. Molecular Weight Calculator also leads on iOS requirement (13 vs 15.0). Plus42's advantage is update cadence (weekly vs every 29 months) and ratings volume (79 vs 3). On rating, ads, in-app purchases and device support there is nothing between them.

Molecular Weight Calculator costs $2.99 and Plus42 $9.99 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 4.9 for Plus42. That said, the two scores are not equally well evidenced: Plus42 has 79 ratings behind it against 3, so its average is the more settled of the two.

Molecular Weight Calculator ships an update every 29 months, Plus42 weekly. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Molecular Weight Calculator | Plus42 |
| --- | --- | --- |
| Price | **$2.99** | $9.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/molecular-weight-calculator/id1444836038/reviews)** | [4.9 (79 ratings)](https://appshunter.io/ios/app/plus42/id1597963622/reviews) |
| Number of ratings | 3 | **79** |
| Positive reviews | — | 92.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 11 MB |
| Requires iOS | **13** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Thomas Okken](https://appshunter.io/developer/337692632) |

## 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


### Plus42

[App page](https://appshunter.io/ios/app/plus42/id1597963622)

This advanced scientific calculator simulates the classic HP-42S RPN calculator with enhanced features. It offers algebraic expressions, unit conversions, directories for storage, a larger resizable display, financial functions, and 2D plotting with integral and root finding.

**Highlights:** HP-42S RPN calculator simulation, Algebraic expressions, Attached units and conversions, Program and variable directories, Resizable 8-row, 22-column display, Time value of money and amortization, 2D function plotting with zoom and pan

**Features:** 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 Plus42 free?

Plus42 costs $9.99, with no in-app purchases.

### Which has better reviews, Molecular Weight Calculator or Plus42?

Molecular Weight Calculator is rated higher. Molecular Weight Calculator averages 5.0 out of 5 from 3 ratings, while Plus42 averages 4.9 from 79 ratings.

### Do Molecular Weight Calculator or Plus42 have ads?

Neither Molecular Weight Calculator nor Plus42 shows ads.

### Which is updated more often, Molecular Weight Calculator or Plus42?

Molecular Weight Calculator ships an update every 29 months, and Plus42 weekly. Most recently, Molecular Weight Calculator was updated on October 15, 2026 and Plus42 on October 25, 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.*