Comparison

Flange Bolt Size & Torque vs Workstrings

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

Head to head
About

Flange Bolt Size & Torque

Instantly access flange, pipe, and bolt data offline. Quickly find bolt sizes, torque patterns, flange dimensions, and pipe specifications. Ideal for pipefitters and steamfitters needing rapid access to piping information.

Highlights
  • Offline data access
  • Instant data lookups
  • Flange bolting data
  • Flange dimensions data
  • Pipe data
  • Gasket data
  • Torque pattern images
Features
Read full description

Lookup flange, pipe, and bolt data in seconds with Flange Bolt Chart. All data is available offline, lookups are instantaneous. Here's just a sample of the available data. Flange bolting data: 1. Number of bolts 2. Diameter of bolts 3. Length of bolts 4. Wrench size 5. Torque pattern 6. Target torque Flange dimensions data: 1. Outside diameter of flange 2. Flange thickness 3. Diameter of bolt circle 4. Flange weight Pipe data: 1. Outside diameter 2. Wall thickness 3. Schedule 4. Weight 5. Weight with liquid Gasket data: 1. Gasket inside diameter 2. Gasket outside diameter 3. Spiral wound dimensions 4. Type R ring dimensions And many more fields. All values are calculated or sourced directly from official standards like ASME B16.5 "Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard". Looking up flange, pipe, and bolt data with Flange Bolt Chart is far faster and less error prone than searching through PDF charts and tables. The sole purpose of the tool is to make it as simple as possible for pipefitters, steamfitters, and others working in piping to look up piping information like flange bolt size and torque pattern. Is there a feature you'd like from Flange Bolt Chart that you don't see? Request it through the app and we'll do our best to add it to the development schedule. Features of the app: 1. Full offline capability: No internet connection necessary to use. All data is stored locally on your phone. (The app requires minimum storage space overall) 2. Instant data lookups. Just enter the necessary inputs (like nominal pipe size and flange class) and the app instantly populates the correct values for the flange, pipe, or bolt outputs you’re searching for. 3. Flange torque sequence images: Includes the full list of torque sequences in picture form, with the studs numbered. The information in this app covers, but is not limited to: (1) flanges with rating class designations 150, 300, 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 60 and flanges with rating class designation 2500 in sizes NPS 1/2 through NPS 12, with requirements given in U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units; (2) flanged fittings with rating class designation 150 and 300 in sizes NPS 1/2 through NPS 60, with requirements given in U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units; (3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 60 and flanged fittings with rating class designation 2500 in sizes NPS 1/2 through NPS 12 in U.S. Customary units. Covers 4 bolt to 60 bolt sequences. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Workstrings

Access and share detailed product specifications for a wide range of tubular goods and specialized joints. Easily search, view, and download spec sheets for items like drill pipe, landing string, and drill collars.

Highlights
  • Search product specifications
  • View detailed spec sheets
  • Download specification documents
  • Share product information
  • Browse tubular goods
  • Access Worktech Joints specs
Features
Read full description

The Workstrings International Spec Sheet finder allows you to search for, view, download, and share specifications for a variety of Workstrings' products including Drill Pipe, Landing String, Heavy Weight Drill Pipe, Drill Collars, Tubing, Completion and Intervention Tubulars, and Worktech Joints

Screenshots

Flange Bolt Size & Torque4 screens
Workstrings4 screens

Verdict

The call

The clearest difference is in-app purchases: Workstrings at none against Flange Bolt Size & Torque's 2. Workstrings also leads on review sentiment (100% vs 65%) and rating (5.0 vs 4.6). Flange Bolt Size & Torque's advantage is ratings volume (363 vs 14). On price, ads and device support 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. Flange Bolt Size & Torque sells 2 in-app purchases, starting at $4.99 per 3 months. Workstrings asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Workstrings holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flange Bolt Size & Torque has 363 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 65% of Flange Bolt Size & Torque's written reviews are positive against 100% of Workstrings's.

UpkeepUpdate frequency

Flange Bolt Size & Torque ships an update monthly, Workstrings every 8 days. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

Scorecard7 real differences · 3 level
Flange Bolt Size & Torque versus Workstrings: the parameters behind the verdict, then further details
ParameterFlange Bolt Size & TorqueWorkstrings
PriceFreeFree
Rating4.6 (363 ratings)5.0 (14 ratings) — better
Positive reviews65.2% of reviews100.0% of reviews — better
Number of ratings363 — better14
Update frequencyMonthlyEvery 8 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size31 MB135 MB
Age rating4+4+
DeveloperOpen Source Consulting LLCSESI Holdings, Inc.

Customer experience

Flange Bolt Size & Torque

All ratings363 ratings
Positive89.5%
Neutral2.2%
Negative8.3%
Written reviews46 reviews
Positive65.2%
Neutral0.0%
Negative34.8%

Workstrings

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Flange Bolt Size & Torque

Reported bugs

6 issues
  • App stopped working, requires resubscription
  • App will not open after latest update
  • App is broken
  • Black screen and grey bar in the middle
  • Wrench sizes don't match up on some flanges
Show 1 more
  • Torque patterns on some flanges are off

Requested features

7 requests
  • Add Code 61/62 flange information
  • Include machined bolt sizes
  • Add torquing equipment info (rad guns, J gun, etc.) and usage instructions
  • Include CGI and CG torque specs for different gasket styles
  • Add support for larger flange sizes (beyond 60")
Show 2 more
  • Add RTJ selection
  • Availability on Windows tablet

Workstrings

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Flange Bolt Size & Torque

Subscriptions1
  • Flange Bolt Professional$4.993 Months
One-time1
  • Suggested Torque$0.99
None

Workstrings

No in-app purchases

Questions

Is Flange Bolt Size & Torque free?
Flange Bolt Size & Torque is free to download, with in-app purchases available.
Is Workstrings free?
Workstrings is free to download, with no in-app purchases.
Which has better reviews, Flange Bolt Size & Torque or Workstrings?
Workstrings is rated higher. Flange Bolt Size & Torque averages 4.6 out of 5 from 363 ratings, while Workstrings averages 5.0 from 14 ratings.
Do Flange Bolt Size & Torque or Workstrings have ads?
Neither Flange Bolt Size & Torque nor Workstrings shows ads.
Which is updated more often, Flange Bolt Size & Torque or Workstrings?
Flange Bolt Size & Torque ships an update monthly, and Workstrings every 8 days. Most recently, Flange Bolt Size & Torque was updated on October 13, 2026 and Workstrings on October 1, 2026.

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