Comparison

Triple J Ductwork vs Flat Pattern Bend Calculator

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

Head to head
About

Triple J Ductwork

This app allows users to request quotes for custom metal parts, including ductwork and signs. It features a part-picking tool and a space to input specific measurements for fabrication projects.

Highlights
  • Custom part quoting
  • Part picking tool
  • Measurement specification
  • Sheet metal fabrication
  • Ductwork services
Features
Read full description

Triple J Ductwork in Waterford, Michigan specializing in high quality commercial and residential ductwork, spiral ductwork, custom sheet metal products, metal signs, metal art, and heating and cooling products. Established in 1997 we fabricate metal products for projects of all sizes. This app allows you to obtain a quote for custom parts with a part picking tool and space to specify custom measurements.

About

Flat Pattern Bend Calculator

This app provides accurate flat pattern layouts for complex sheet metal shapes and transitions. It simplifies calculations for cones, frustums, cylinders, and various transition pieces, saving time and reducing errors in fabrication projects.

Highlights
  • Cone calculations
  • Frustum calculations
  • Truncated cylinder layouts
  • Bend allowance calculations
  • Transition piece generation
  • Complex shape patterns
Features
Read full description

Unlock the power of advanced sheet metal calculations right at your fingertips. Flat Pattern Bend Calculator is a comprehensive tool designed for engineers, fabricators, and designers who need quick and accurate flat pattern layouts for a variety of complex shapes and transitions. This app simplifies complex metal sheet calculations, enabling users to accurately calculate flat pattern bends for various shapes and structures ► Key Features: Cone Calculations: Easily generate flat patterns for conical shapes. Frustum Eccentric (Parallel & Angle): Compute flat patterns for both parallel and angled eccentric frustums with precision. Truncated Cylinder: Obtain accurate layouts for truncated cylindrical shapes. Bend Allowance Calculations: Calculate bend allowances and deductions for various angles to ensure perfect bends every time. ► Transition Pieces: Rectangle to Circle: Seamlessly transition between rectangular and circular shapes. Rectangle to Circle Eccentric: Handle off-center transitions with ease. Circle to Rectangle: Convert circular shapes to rectangular patterns effortlessly. Rectangle to Rectangle: Calculate flat patterns for rectangular transitions. Complex Shapes: Pants & Pants Eccentric: Design complex bifurcated ducts and fittings. Breeches: Create layouts for Y-shaped connections. Tees: Generate patterns for T-shaped junctions. Pyramid: Calculate flat patterns for pyramid-shaped objects. Auger: Design helical screw patterns with precision. Sphere: Compute flat layouts for spherical shapes. Flange: Generate accurate flange patterns for pipe fittings. Why Choose Our App? • Efficiency: Reduce manual calculations and save valuable time on your projects. • Accuracy: Minimize errors with precise computations tailored to your specific needs. • User-Friendly Interface: Intuitive design makes complex calculations accessible to everyone. • Versatility: Ideal for HVAC ductwork, industrial piping, metal roofing, and custom fabrication projects. • Instant Results: Get immediate calculations to accelerate your workflow. Who Can Benefit? • Sheet Metal Fabricators • Mechanical Engineers • HVAC Professionals • Metalworkers and Welders • Industrial Designers • Students and Educators in Engineering Fields Take Your Fabrication Projects to the Next Level! Say goodbye to cumbersome manual calculations and hello to streamlined efficiency. Download the Sheet Metal Flat Pattern Calculator now and experience the future of metal fabrication. Download Today and Start Shaping Your Success! Privacy Policy : https://forms.gle/dnBUgnpqw4AREio97 Terms of Use : https://forms.gle/2uy2JqJa2JjkTZpo8

Screenshots

Triple J Ductwork3 screens
Flat Pattern Bend Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Triple J Ductwork at none against Flat Pattern Bend Calculator's 6. Triple J Ductwork also leads on ads (none vs shown) and rating (5.0 vs 4.6). Flat Pattern Bend Calculator's advantage is ratings volume (151 vs 2) and update cadence (every 2 months vs every 5 months). On price 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. Flat Pattern Bend Calculator sells 6 in-app purchases, starting at $4.99 per month. Triple J Ductwork asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Triple J Ductwork holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flat Pattern Bend Calculator has 151 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Triple J Ductwork ships an update every 5 months, Flat Pattern Bend Calculator every 2 months. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

Scorecard7 real differences · 3 level
Triple J Ductwork versus Flat Pattern Bend Calculator: the parameters behind the verdict, then further details
ParameterTriple J DuctworkFlat Pattern Bend Calculator
PriceFreeFree
Rating5.0 (2 ratings) — better4.6 (151 ratings)
Positive reviews—46.9% of reviews
Number of ratings2151 — better
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better15.0
Further details — not scored
Size24 MB61 MB
Age rating4+4+
DeveloperBiznetIS Net IncBhavinkumar Satashiya

Customer experience

Triple J Ductwork

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Flat Pattern Bend Calculator

All ratings151 ratings
Positive90.1%
Neutral1.3%
Negative8.6%
Written reviews32 reviews
Positive46.9%
Neutral6.3%
Negative46.9%

In-app purchases

None

Triple J Ductwork

No in-app purchases

6 purchases

Flat Pattern Bend Calculator

Subscriptions5
  • MONTHLY UNLOCK$4.991 Month
  • Weekly Subscription$4.997 Days
  • Offer : Yearly Access$19.991 Year
Show 2 more
  • YEARLY UNLOCK3 Days trial$29.991 Year
  • Yearly Access$29.991 Year
One-time1
  • LIFETIME UNLOCK$49.99

Questions

Is Triple J Ductwork free?
Triple J Ductwork is free to download, with no in-app purchases.
Is Flat Pattern Bend Calculator free?
Flat Pattern Bend Calculator is free to download, with in-app purchases available.
Which has better reviews, Triple J Ductwork or Flat Pattern Bend Calculator?
Triple J Ductwork is rated higher. Triple J Ductwork averages 5.0 out of 5 from 2 ratings, while Flat Pattern Bend Calculator averages 4.6 from 151 ratings.
Do Triple J Ductwork or Flat Pattern Bend Calculator have ads?
Flat Pattern Bend Calculator shows ads; Triple J Ductwork does not.
Which is updated more often, Triple J Ductwork or Flat Pattern Bend Calculator?
Triple J Ductwork ships an update every 5 months, and Flat Pattern Bend Calculator every 2 months. Most recently, Triple J Ductwork was updated on October 12, 2026 and Flat Pattern Bend Calculator on October 15, 2026.

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