# Oilfield ECD Pro vs Workstrings

The clearest difference is price: Workstrings at Free against Oilfield ECD Pro's $0.99. Workstrings also leads on rating (5.0 vs 3.0) and update cadence (every 8 days vs every 37 months). On ads, in-app purchases and device support there is nothing between them.

Workstrings is free to download; Oilfield ECD Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Workstrings holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Workstrings has 14 ratings behind it against 1, so its average is the more settled of the two.

Oilfield ECD Pro ships an update every 37 months, Workstrings every 8 days. The most recent releases landed on September 21, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Oilfield ECD Pro | Workstrings |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/oilfield-ecd-pro/id921381261/reviews) | **[5.0 (14 ratings)](https://appshunter.io/ios/app/workstrings/id6740924535/reviews)** |
| Number of ratings | 1 | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 8 days** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 135 MB |
| Requires iOS | 16.2 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [zhandos uakanov](https://appshunter.io/developer/625286817) | [SESI Holdings, Inc.](https://appshunter.io/developer/1777501957) |

## What reviewers say

### Oilfield ECD Pro

[App page](https://appshunter.io/ios/app/oilfield-ecd-pro/id921381261)

This tool simplifies Equivalent Circulating Density (ECD) calculations for oilfield professionals. It allows for easy input of pressure, depth, and mud weight, providing instant, accurate ECD values. Supports both imperial and metric units for global operations.

**Highlights:** Unit selection (OilField/Metric), Annular pressure/friction loss input, True Vertical Depth (TVD) input, Mud weight/specific gravity input, Instant ECD calculation, API data compliance

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

**In-app purchases:** none


### Workstrings

[App page](https://appshunter.io/ios/app/workstrings/id6740924535)

Access and share detailed product specifications for a wide range of tubular goods and specialized joints. Easily search, view, and download spec sheets for items like drill pipe, landing string, and drill collars.

**Highlights:** Search product specifications, View detailed spec sheets, Download specification documents, Share product information, Browse tubular goods, Access Worktech Joints specs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Oilfield ECD Pro free?

Oilfield ECD Pro costs $0.99, with no in-app purchases.

### Is Workstrings free?

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

### Which has better reviews, Oilfield ECD Pro or Workstrings?

Workstrings is rated higher. Oilfield ECD Pro averages 3.0 out of 5 from 1 ratings, while Workstrings averages 5.0 from 14 ratings.

### Do Oilfield ECD Pro or Workstrings have ads?

Neither Oilfield ECD Pro nor Workstrings shows ads.

### Which is updated more often, Oilfield ECD Pro or Workstrings?

Oilfield ECD Pro ships an update every 37 months, and Workstrings every 8 days. Most recently, Oilfield ECD Pro was updated on September 21, 2026 and Workstrings on June 10, 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.*