# FieldMaster Supervisor vs IGases Calculator

The clearest difference is update cadence: FieldMaster Supervisor at every 4 months against IGases Calculator's every 19 months. On price, ads, in-app purchases and device support there is nothing between them.

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

FieldMaster Supervisor ships an update every 4 months, IGases Calculator every 19 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FieldMaster Supervisor | IGases Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/igases-calculator/id1662802822/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 19 months |
| Monetization | — | Free |
| Size | 23 MB | 38 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trimble Inc.](https://appshunter.io/developer/322561665) | [Faris Obaid ullah](https://appshunter.io/developer/1662802824) |

## What reviewers say

### FieldMaster Supervisor

[App page](https://appshunter.io/ios/app/fieldmaster-supervisor/id987403868)

**Features:** Vision Pro support

**In-app purchases:** none


### IGases Calculator

[App page](https://appshunter.io/ios/app/igases-calculator/id1662802822)

This app provides a comprehensive reference for industrial, medical, and specialized gases. It includes a unit converter to easily switch between international measurement units, helping users select the appropriate gas.

**Highlights:** Industrial gas reference, Medical gas reference, Specialized gas reference, Unit converter, International unit conversion

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FieldMaster Supervisor free?

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

### Is IGases Calculator free?

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

### Do FieldMaster Supervisor or IGases Calculator have ads?

Neither FieldMaster Supervisor nor IGases Calculator shows ads.

### Which is updated more often, FieldMaster Supervisor or IGases Calculator?

FieldMaster Supervisor ships an update every 4 months, and IGases Calculator every 19 months. Most recently, FieldMaster Supervisor was updated on October 19, 2026 and IGases Calculator on October 24, 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.*