# Aegis ChemCalc vs Vector EHS

The clearest difference is review sentiment: Aegis ChemCalc at 100% against Vector EHS's 0%. Aegis ChemCalc also leads on rating (5.0 vs 1.6) and iOS requirement (11.0 vs 16.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

Aegis ChemCalc holds the better App Store score, 5.0 against 1.6. Both are backed by a comparable volume of ratings — 4 and 7 respectively. Written reviews point the same way: 100% of Aegis ChemCalc's written reviews are positive against 0% of Vector EHS's.

Aegis ChemCalc ships an update every 2 months, Vector EHS every 5 weeks. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Aegis ChemCalc | Vector EHS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/aegis-chemcalc/id6740779077/reviews)** | [1.6 (7 ratings)](https://appshunter.io/ios/app/vector-ehs/id6749044772/reviews) |
| Number of ratings | 4 | **7** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 49 MB | 60 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aegis Chemical Solutions, LLC](https://appshunter.io/developer/1815306858) | [Vector Solutions, Inc.](https://appshunter.io/developer/1510023610) |

## What reviewers say

### Aegis ChemCalc

[App page](https://appshunter.io/ios/app/aegis-chemcalc/id6740779077)

This tool provides essential calculations for oil well chemical applications. It features the most frequently used formulas for field operations, designed for efficiency and accuracy.

**Highlights:** Oil well chemical calculations, Common field calculations, Designed for field use, Accurate results

**Features:** macOS Compatibility

**In-app purchases:** none


### Vector EHS

[App page](https://appshunter.io/ios/app/vector-ehs/id6749044772)

Conduct EHS inspections and record incidents with or without internet access. Utilize pre-built or custom checklists, attach photos, and pinpoint GPS locations. Streamline safety processes and assign corrective actions for detailed analysis.

**Highlights:** Offline EHS inspections and incident recording, Customizable and pre-built checklists, Photo and GPS location attachment, Corrective action assignment, Data submission for analysis, Mobile-first design

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

**In-app purchases:** none


## Frequently asked questions

### Is Aegis ChemCalc free?

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

### Is Vector EHS free?

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

### Which has better reviews, Aegis ChemCalc or Vector EHS?

Aegis ChemCalc is rated higher. Aegis ChemCalc averages 5.0 out of 5 from 4 ratings, while Vector EHS averages 1.6 from 7 ratings.

### Do Aegis ChemCalc or Vector EHS have ads?

Neither Aegis ChemCalc nor Vector EHS shows ads.

### Which is updated more often, Aegis ChemCalc or Vector EHS?

Aegis ChemCalc ships an update every 2 months, and Vector EHS every 5 weeks. Most recently, Aegis ChemCalc was updated on October 6, 2026 and Vector EHS on September 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.*