Comparison

Virtual Flange Slide Rule vs Quail Tools

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Virtual Flange Slide Rule

Access essential measurements and dimensional data for API 6A integral flanges. This tool provides quick access to critical specifications for engineering and industrial applications.

Highlights
  • API 6A integral flange data
  • Relevant measurements
  • Dimensional data access
  • Engineering specifications
Features
Read full description

Valveworks USA presents the Virtual Flange Slide Rule. This application gives you access to all the relevant measurements and dimensional data for the API 6A integral flange.

About

Quail Tools

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
Read full description

The app allows users to select Tubulars or BOPS to view specs. Users will also have access to our newly added API Casing General Information table. The initial page will allow the user to select between three sections of the app: Tubulars, BOPs, or Casing. Upon selecting "Tubulars" or "BOPs, the user will be presented with a built in table that contains essential information. Therefore, it does not require an internet connection to function! This will allow for constant, unhindered access to tubular and BOP information such as: tool joint OD, tool joint ID, max make up torque, premium tensile, BOP height, BOP weight, BOP pressure rating, BOP bonnet type, BOP operating data, and BOP shear testing videos. Upon selecting the "API Casing - General Information" button, the user will have access to a built in table containing standard API casing information. You can now view essential specs in areas where there is little or no cell phone reception. When selecting "Tubulars" or "BOPs", simply tap the item to view the spec sheet. This retrieves the spec sheet from our website, which can be shared using the button on the top right. (Please note: this function does require an internet connection). From there, the spec sheet can also be saved to your phone, or any handled via another app. We hope you enjoy this app as much as we have. Please feel free to provide feedback via the contact us button in the app.

Screenshots

Virtual Flange Slide Rule4 screens
Quail Tools4 screens

Verdict

The call

The clearest difference is update cadence: Quail Tools at every 5 weeks against Virtual Flange Slide Rule's every 4 months. Quail Tools also leads on iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Virtual Flange Slide Rule against 5.0 for Quail Tools. Both are backed by a comparable volume of ratings — 13 and 22 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Virtual Flange Slide Rule ships an update every 4 months, Quail Tools every 5 weeks. The most recent releases landed on September 14, 2026 and June 1, 2026 respectively.

Scorecard2 real differences · 8 level
Virtual Flange Slide Rule versus Quail Tools: the parameters behind the verdict, then further details
ParameterVirtual Flange Slide RuleQuail Tools
PriceFreeFree
Rating5.0 (13 ratings)5.0 (22 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1322 — better
Update frequencyEvery 4 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size3 MB50 MB
Age rating4+4+
DeveloperAmerican Certified Equipment, Inc.Austin Angelle

Customer experience

Virtual Flange Slide Rule

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Quail Tools

All ratings22 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Virtual Flange Slide Rule

No in-app purchases

None

Quail Tools

No in-app purchases

Questions

Is Virtual Flange Slide Rule free?
Virtual Flange Slide Rule is free to download, with no in-app purchases.
Is Quail Tools free?
Quail Tools is free to download, with no in-app purchases.
Which has better reviews, Virtual Flange Slide Rule or Quail Tools?
Virtual Flange Slide Rule and Quail Tools are both rated 5.0 out of 5 on the App Store, from 13 and 22 ratings respectively.
Do Virtual Flange Slide Rule or Quail Tools have ads?
Neither Virtual Flange Slide Rule nor Quail Tools shows ads.
Which is updated more often, Virtual Flange Slide Rule or Quail Tools?
Virtual Flange Slide Rule ships an update every 4 months, and Quail Tools every 5 weeks. Most recently, Virtual Flange Slide Rule was updated on September 14, 2026 and Quail Tools on June 1, 2026.

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