# Workover Assistant vs Gas Compressibility Factor Z

The clearest difference is update cadence: Gas Compressibility Factor Z at every 8 months against Workover Assistant's every 58 months. Gas Compressibility Factor Z also leads on iOS requirement (13.0 vs 16.6). 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.

Workover Assistant ships an update every 58 months, Gas Compressibility Factor Z every 8 months. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Workover Assistant | Gas Compressibility Factor Z |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/workover-assistant/id1117692519/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 58 months | **Every 8 months** |
| Monetization | Free | — |
| Size | 3 MB | 3 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Carlos Moura](https://appshunter.io/developer/407501202) |

## What reviewers say

### Workover Assistant

[App page](https://appshunter.io/ios/app/workover-assistant/id1117692519)

This utility app assists oil and gas field personnel with essential calculations for well workovers. It provides tools for hydrostatic pressure, internal capacity, and other critical functions, serving as a convenient resource for rig site or office use.

**Highlights:** Hydrostatic pressure calculations, Internal capacity calculations, Oil and gas well workover tools, Rig site and office utility, Accurate field calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Gas Compressibility Factor Z

[App page](https://appshunter.io/ios/app/gas-compressibility-factor-z/id1626924678)

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

**In-app purchases:** none


## Frequently asked questions

### Is Workover Assistant free?

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

### Is Gas Compressibility Factor Z free?

Gas Compressibility Factor Z is free to download, with no in-app purchases.

### Do Workover Assistant or Gas Compressibility Factor Z have ads?

Neither Workover Assistant nor Gas Compressibility Factor Z shows ads.

### Which is updated more often, Workover Assistant or Gas Compressibility Factor Z?

Workover Assistant ships an update every 58 months, and Gas Compressibility Factor Z every 8 months. Most recently, Workover Assistant was updated on October 20, 2026 and Gas Compressibility Factor Z on October 7, 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.*