# Workover Assistant vs ECD Calculator

The clearest difference is in-app purchases: Workover Assistant at none against ECD Calculator's 2. ECD Calculator's advantage is update cadence (every 5 days vs every 58 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. ECD Calculator sells 2 one-off in-app purchases. Workover Assistant asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Workover Assistant against 5.0 for ECD Calculator. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

Workover Assistant ships an update every 58 months, ECD Calculator every 5 days. The most recent releases landed on October 4, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Workover Assistant | ECD Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/workover-assistant/id1117692519/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/ecd-calculator/id6754762850/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 58 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 3 MB | 45 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Drillsoft LLC](https://appshunter.io/developer/1787962403) |

## 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


### ECD Calculator

[App page](https://appshunter.io/ios/app/ecd-calculator/id6754762850)

This utility app assists drilling and mud engineers in calculating Equivalent Circulating Density (ECD) at any point during operations. It offers a streamlined process with just a few clicks.

**Highlights:** ECD calculation, Drilling engineering, Mud engineering, Point-of-operation calculation, Streamlined interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 credits | $3.99 | one-time |
| 300 Credits | $9.99 | one-time |


## Frequently asked questions

### Is Workover Assistant free?

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

### Is ECD Calculator free?

ECD Calculator is free to download, with in-app purchases available.

### Which has better reviews, Workover Assistant or ECD Calculator?

Workover Assistant and ECD Calculator are both rated 5.0 out of 5 on the App Store, from 2 and 5 ratings respectively.

### Do Workover Assistant or ECD Calculator have ads?

Neither Workover Assistant nor ECD Calculator shows ads.

### Which is updated more often, Workover Assistant or ECD Calculator?

Workover Assistant ships an update every 58 months, and ECD Calculator every 5 days. Most recently, Workover Assistant was updated on October 4, 2026 and ECD Calculator on October 6, 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.*