# OilField Engineer vs Quail Tools

The clearest difference is price: Quail Tools at Free against OilField Engineer's $3.99. Quail Tools also leads on rating (5.0 vs 1.0) and update cadence (every 5 weeks vs every 54 months). OilField Engineer's advantage is chart position (#196 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Quail Tools is free to download; OilField Engineer costs $3.99 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 1.0. 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 Engineer ships an update every 54 months, Quail Tools every 5 weeks. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | OilField Engineer | Quail Tools |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/oilfield-engineer/id1042382933/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 54 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#196** | — |
| Size | 32 MB | 50 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | 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 Engineer

[App page](https://appshunter.io/ios/app/oilfield-engineer/id1042382933)

**Currently charting:** #196 Top Paid · Reference (US App Store)

This app supports oilfield engineers and specialists with daily operations. It offers a news generator, over 300 calculators for drilling and production, reference tables, market prices, and a unit converter.

**Highlights:** Oil and Gas News Generator, 300+ Oilfield Calculators, Drilling and Production Reference Tables, Crude Oil and Gas Market Prices, Oil and Gas Unit Converter

**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 Engineer free?

OilField Engineer costs $3.99, 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 Engineer or Quail Tools?

Quail Tools is rated higher. OilField Engineer averages 1.0 out of 5 from 1 ratings, while Quail Tools averages 5.0 from 22 ratings.

### Do OilField Engineer or Quail Tools have ads?

Neither OilField Engineer nor Quail Tools shows ads.

### Which is updated more often, OilField Engineer or Quail Tools?

OilField Engineer ships an update every 54 months, and Quail Tools every 5 weeks. Most recently, OilField Engineer was updated on October 17, 2026 and Quail Tools on October 5, 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.*