FZ SIide Rule vs Quail Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Integral flange dimensions
- Ring groove dimensions
- R Type ring gasket calculations
- Pocket-sized slide rule functionality
- High-pressure wellhead equipment data
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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
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.
- 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
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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
Verdict
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
Both are free to download. 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.
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.
| Parameter | FZ SIide Rule | Quail Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (22 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 22 — better |
| Update frequency | Fortnightly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 11 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | D Young | Austin Angelle |
Customer experience
FZ SIide Rule
Quail Tools
In-app purchases
FZ SIide Rule
No in-app purchases
Quail Tools
No in-app purchases
Questions
Is FZ SIide Rule free?
Is Quail Tools free?
Which has better reviews, FZ SIide Rule or Quail Tools?
Do FZ SIide Rule or Quail Tools have ads?
Which is updated more often, FZ SIide Rule or Quail Tools?
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