FabCalc: Flat Pattern DXF
Sheet Metal Layout & Unfold
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The flat pattern calculator your fab shop needs — cylinders, cone gores, duct wraps, and more. Fully offline. No account. No ads.
Stop laying out cone gores by hand on the table. Stop guessing developed length on a duct wrap. FabCalc generates shop-ready flat pattern drawings and 1:1 DXF files for common fabricated shapes.
WHAT'S INSIDE
• Cylinder wrap — full shell and partial segments
• Half-pipe sleeve — 180° cylinder segments
• Cone / frustum gore — annular sector with slant length and arc development
• Rectangular duct wrap — four-panel strip with bend lines and bend allowance
• Live 2D preview — cut profile, bend lines, roll direction, dimensions
• DXF export — AutoCAD R12 ASCII, layered (CUT, BEND, ROLL, TEXT), 1:1 scale
• PDF job sheet — drawing, inputs, calculated values, notes
• Saved jobs — reopen and edit patterns locally
WHO IT'S FOR
Fabricators, sheet metal workers, pipe fitters, boilermakers, plasma/laser operators, and shop owners who need accurate flat patterns without desktop CAD.
FREE vs PRO
Free forever: all shape inputs, live preview, calculated values, warnings, and DXF cut-file export.
Pro unlocks PDF job sheets and unlimited saved jobs. One-time purchase or subscription.
Subscriptions auto-renew until cancelled. Manage in your Apple ID Subscription Settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://doublevision.company/privacy
NO ACCOUNT. NO ADS. NO DATA COLLECTION.
FabCalc works on the layout table, at the plasma table, in the truck. Everything runs locally.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New: the Fab Shop Bundle — one purchase unlocks FabCalc Pro and WelderCalc Pro together.
The developer, Double Vision USA LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Double Vision USA LLC
- Size
- 817.2 KB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Fab Shop Bundle $119.99
- FabCalc Pro Yearly $29.99
- FabCalc Pro Monthly $4.99
- ShopCalc Pro Lifetime $129.99
- Copyright
- © 2026 Double Vision USA LLC
