Comparison

FZ SIide 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

FZ SIide Rule

This application provides a digital slide rule for finding critical dimensions of high-pressure wellhead equipment, including integral flange and ring groove measurements. It functions like a traditional paper slide rule, offering convenience and accessibility for users needing these specific engineering calculations.

Highlights
  • Integral flange dimensions
  • Ring groove dimensions
  • R Type ring gasket calculations
  • Pocket-sized slide rule functionality
  • High-pressure wellhead equipment data
Features
Read full description

This app will allow the user to find all critical dimensions of high pressure wellhead equipment integral flange and ring groove dimensions. A modern update of the classic slide rule. Operates the same way a typical paper flange slide rule works now available in your pocket anytime anywhere. The app includes slide rules for Integral Flanges Ring Grooves R Type Ring Gaskets

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

FZ SIide Rule2 screens
Quail Tools4 screens

Verdict

The call

The clearest difference is rating: Quail Tools at 5.0 against FZ SIide Rule's 1.0. Quail Tools also leads on ratings volume (22 vs 1). FZ SIide Rule's advantage is update cadence (fortnightly vs every 5 weeks) and iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and monetization model 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

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.

UpkeepUpdate frequency

FZ SIide Rule ships an update fortnightly, Quail Tools every 5 weeks. The most recent releases landed on September 26, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
FZ SIide Rule versus Quail Tools: the parameters behind the verdict, then further details
ParameterFZ SIide RuleQuail Tools
PriceFreeFree
Rating1.0 (1 ratings)5.0 (22 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings122 — better
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better12.0
Further details — not scored
Size11 MB50 MB
Age rating4+4+
DeveloperD YoungAustin Angelle

Customer experience

FZ SIide Rule

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Quail Tools

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

In-app purchases

None

FZ SIide Rule

No in-app purchases

None

Quail Tools

No in-app purchases

Questions

Is FZ SIide Rule free?
FZ SIide 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, FZ SIide Rule or Quail Tools?
Quail Tools is rated higher. FZ SIide Rule averages 1.0 out of 5 from 1 ratings, while Quail Tools averages 5.0 from 22 ratings.
Do FZ SIide Rule or Quail Tools have ads?
Neither FZ SIide Rule nor Quail Tools shows ads.
Which is updated more often, FZ SIide Rule or Quail Tools?
FZ SIide Rule ships an update fortnightly, and Quail Tools every 5 weeks. Most recently, FZ SIide Rule was updated on September 26, 2026 and Quail Tools on October 5, 2026.

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