# Oilfield ECD Pro vs Quail Tools

The clearest difference is price: Quail Tools at Free against Oilfield ECD Pro's $0.99. Quail Tools also leads on rating (5.0 vs 3.0) and update cadence (every 5 weeks vs every 37 months). On ads and in-app purchases there is nothing between them.

Quail Tools 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.

Quail Tools holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Quail Tools has 22 ratings behind it against 1, so its average is the more settled of the two.

Oilfield ECD Pro ships an update every 37 months, Quail Tools every 5 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Oilfield ECD Pro | Quail Tools |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/oilfield-ecd-pro/id921381261/reviews) | **[5.0 (22 ratings)](https://appshunter.io/ios/app/quail-tools/id1279372123/reviews)** |
| Number of ratings | 1 | **22** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 50 MB |
| Requires iOS | 16.2 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [zhandos uakanov](https://appshunter.io/developer/625286817) | [Austin Angelle](https://appshunter.io/developer/1801766276) |

## 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


### Quail Tools

[App page](https://appshunter.io/ios/app/quail-tools/id1279372123)

Access essential specifications for Tubulars, BOPs, and API Casing offline. View detailed data like tool joint OD, make-up torque, and pressure ratings. Share spec sheets when an internet connection is available.

**Highlights:** Offline access to Tubular and BOP specs, API Casing General Information table, Detailed spec sheets for equipment, Shareable spec sheets (online), Save spec sheets to device, Tool joint OD, ID, torque, tensile, BOP pressure rating, bonnet type, operating data

**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 Quail Tools free?

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

### Which has better reviews, Oilfield ECD Pro or Quail Tools?

Quail Tools is rated higher. Oilfield ECD Pro averages 3.0 out of 5 from 1 ratings, while Quail Tools averages 5.0 from 22 ratings.

### Do Oilfield ECD Pro or Quail Tools have ads?

Neither Oilfield ECD Pro nor Quail Tools shows ads.

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

Oilfield ECD Pro ships an update every 37 months, and Quail Tools every 5 weeks. Most recently, Oilfield ECD Pro was updated on November 1, 2026 and Quail Tools on November 3, 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.*