# Triple J Ductwork vs Flat Pattern Bend Calculator

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.

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.

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.

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.

## The numbers

| Metric | Triple J Ductwork | Flat Pattern Bend Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/triple-j-ductwork/id1156907795/reviews)** | [4.6 (151 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews) |
| Number of ratings | 2 | **151** |
| Positive reviews | — | 46.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 24 MB | 61 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BiznetIS Net Inc](https://appshunter.io/developer/682007657) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### Triple J Ductwork

[App page](https://appshunter.io/ios/app/triple-j-ductwork/id1156907795)

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:** macOS Compatibility

**In-app purchases:** none


### Flat Pattern Bend Calculator

[App page](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MONTHLY UNLOCK | $4.99 | per month |
| Weekly Subscription | $4.99 | per 7 days |
| Offer : Yearly Access | $19.99 | per year |
| YEARLY UNLOCK | $29.99 | per year |
| Yearly Access | $29.99 | per year |
| LIFETIME UNLOCK | $49.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*