# Sheet Metal Master — Patterns, Ducts & DXF

> Patterns, Ducts & DXF (iPhone/iPad app by 磊 高.)

- Source: https://appshunter.io/ios/app/sheet-metal-master/id6759945933 (this page in markdown: same URL + `.md`)
- Developer: [磊 高](https://appshunter.io/developer/1879509033)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, German (Germany), Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-03-26
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/sheet-metal-master/id6759945933/reviews.md

## What is Sheet Metal Master?

Sheet Metal Master is an on-device calculation tool for duct fabrication, pipe fitting, and sheet-metal layout. Enter measurable dimensions to preview patterns, define fabrication allowances, save projects, and export DXF files.

15 TASKS
• Ductwork: round-to-rectangle, rectangular reducer, 90° round tee, rectangular offset, rectangular miter elbow, and rectangular tee
• Pipe and vessel work: oblique round tee, equal-diameter round Y branch, segmented elbow, cone/frustum, oblique-cut pipe, and spherical-head gores
• Bending: single bend, double bend, and box bend

WORKFLOW
• Live result and flat-pattern previews
• Welding, riveting, lock-seam, and manual allowances
• Save, reopen, and update local projects
• Share calculation summaries
• Export millimeter-based ASCII R12 DXF files

Core calculations run locally on your device. The round Y branch is a field-fit construction. A sphere cannot be flattened without strain, so spherical-head gores are an approximation with a reported boundary-strain value. Always verify material, connection details, and a sample before production cutting.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SheetMetal Master | $4.99 | per month |



## Version history (last 2 releases)

### 1.1 — 2026-08-31

Added rectangular duct offset, rectangular miter elbow, oblique round tee, equal-diameter round Y branch, rectangular tee, and spherical-head gores. Each template includes calculation preview, fabrication allowances, project persistence, share text, and DXF export. Project schema v3 remains compatible with earlier projects, with expanded validation and DXF regression coverage.

### 1.0 — 2026-03-26

No release notes.

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All apps by 磊 高: https://appshunter.io/developer/1879509033

## Related topics

[sheet metal](https://appshunter.io/ios/topics/sheet-metal)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*