# Triple J Ductwork vs Sheet Metal Master

The clearest difference is in-app purchases: Triple J Ductwork at none against Sheet Metal Master's 1. Triple J Ductwork also leads on iOS requirement (8.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sheet Metal Master sells 1 in-app purchase, starting at $4.99 per month. Triple J Ductwork asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on November 2, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Triple J Ductwork | Sheet Metal Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/triple-j-ductwork/id1156907795/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | Free | — |
| Size | 24 MB | 7 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BiznetIS Net Inc](https://appshunter.io/developer/682007657) | [磊 高](https://appshunter.io/developer/1879509033) |

## 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


### Sheet Metal Master

[App page](https://appshunter.io/ios/app/sheet-metal-master/id6759945933)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SheetMetal Master | $4.99 | per month |


## Frequently asked questions

### Is Triple J Ductwork free?

Triple J Ductwork is free to download, with no in-app purchases.

### Is Sheet Metal Master free?

Sheet Metal Master is free to download, with in-app purchases available.

### Do Triple J Ductwork or Sheet Metal Master have ads?

Neither Triple J Ductwork nor Sheet Metal Master shows ads.

### Which is updated more often, Triple J Ductwork or Sheet Metal Master?

Triple J Ductwork ships an update every 5 months, and Sheet Metal Master every 5 months. Most recently, Triple J Ductwork was updated on November 2, 2026 and Sheet Metal Master on September 23, 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.*