# Vacuums vs Molarity Calcs

The clearest difference is rating: Molarity Calcs at 5.0 against Vacuums's 4.0. Molarity Calcs also leads on update cadence (every 4 days vs every 6 months) and iOS requirement (15.5 vs 17.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Molarity Calcs holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Vacuums ships an update every 6 months, Molarity Calcs every 4 days. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Vacuums | Molarity Calcs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/vacuums/id1241468166/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/molarity-calcs/id1640884409/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 5 MB | 4 MB |
| Requires iOS | 17.6 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Amnaj Sriwilai](https://appshunter.io/developer/1241468165) | [Jeff Schoellerman](https://appshunter.io/developer/1640884411) |

## What reviewers say

### Vacuums

[App page](https://appshunter.io/ios/app/vacuums/id1241468166)

This app assists automation engineers and systems designers in calculating parameters for vacuum handling systems. It helps determine workpiece requirements, holding force, and optimal dimensions for vacuum cups and hoses.

**Highlights:** Workpiece calculation, Holding force calculation, Vacuum cup diameter calculation, Vacuum hose diameter calculation, Evacuation time estimation, Pump suction capacity calculation, Vacuum unit converter

**In-app purchases:** none


### Molarity Calcs

[App page](https://appshunter.io/ios/app/molarity-calcs/id1640884409)

This app helps users quickly calculate molarity for various chemistry needs. It supports calculations for mass to volume, volume to mass, and dilutions, making it a handy tool for students and professionals.

**Highlights:** Mass to volume calculations, Volume to mass calculations, Dilution calculations, Fast and efficient, User-friendly interface

**In-app purchases:** none


## Frequently asked questions

### Is Vacuums free?

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

### Is Molarity Calcs free?

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

### Which has better reviews, Vacuums or Molarity Calcs?

Molarity Calcs is rated higher. Vacuums averages 4.0 out of 5 from 1 ratings, while Molarity Calcs averages 5.0 from 1 ratings.

### Do Vacuums or Molarity Calcs have ads?

Neither Vacuums nor Molarity Calcs shows ads.

### Which is updated more often, Vacuums or Molarity Calcs?

Vacuums ships an update every 6 months, and Molarity Calcs every 4 days. Most recently, Vacuums was updated on October 16, 2026 and Molarity Calcs on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*