Comparison

Sheet Metal Layout vs Unbend Flat Pattern Calculator

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

Head to head
About

Sheet Metal Layout

Features
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Mark out the flat pattern, cut once. Sheet Metal Layout develops the patterns fabricators lay out every day — cones, miter elbows, tees, reducers and square-to-round transitions — right on your phone, fully offline. PATTERNS THAT MATTER • Miter elbow — two-piece, any angle • Cone and frustum — full radial-line development with sector angle • Concentric and eccentric reducers — triangulated true lengths • Round offsets and lobster-back (segmented) elbows • Equal and unequal tees — branch saddle cut depths • Square to round — corner true lengths, laid out LAID OUT RIGHT • Every pattern gives you key dimensions, a schematic and a numbered ordinate / true-length table • A step-by-step "How to lay out" list walks the parallel-line, radial-line or triangulation construction • Copy any ordinate table as text to keep with your job notes • Recent valid calculations stay on your device, ready to rename, reopen, copy or share ACCURATE TO THE METAL • Layout follows the neutral fibre — set the K-factor (mid-wall by default) so bend allowance is built in, not guessed • Pipe mode auto-fills outside diameter and wall from a built-in nominal pipe-size table (½"–12", schedule 40/80) • Sheet mode takes diameter and thickness directly BUILT FOR THE SHOP AND THE FIELD • Inch (fractions to 1/16") or millimetre — one tap to switch • 100% offline — works anywhere, no signal needed • Big controls, screen stays awake, no account • Your inputs never leave your phone SHEET METAL LAYOUT PRO The free version includes the miter elbow, cone / frustum and reducer patterns, plus your three newest saved calculations. Pro unlocks the remaining five patterns and your full local calculation history. Choose a monthly or yearly subscription, or a one-time lifetime option. The three lifetime options unlock the same Pro features; only the support amount differs. Prices are shown in the app before you buy. No ads. Subscriptions are charged to your Apple ID and renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your App Store account settings. If you bought Pro before, it stays unlocked: use Restore purchases. Reference layout only. Add your own seams, laps and material allowance, and always verify before cutting. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://cleverlywittyapps.notion.site/Privacy-Policy-39bc23508849817f844ac12c5cbbba60 Support: cleverlywittyapps@gmail.com

About

Unbend Flat Pattern Calculator

Features
Read full description

Unbend is a sheet metal calculator built for the shop floor, not the office. Type a dimension and the technical drawing redraws live, so you always see exactly which measurement you are editing. BENDING • Bend allowance, bend deduction and flat blank length — free • Single bend, multi-bend profiles with up to eight bends, Z profile, hem and joggle — free • K-factor resolved from material and forming method, with a built-in R/T table — free • U channel: the drawing is free, its numbers and flat pattern are Pro • Bending force, tonnage and V-die figures, a K-factor from your own test bend and your own K-factor per material — Pro FLAT PATTERN DEVELOPMENT • Cone, truncated cone, cylinder, truncated cylinder, segmented elbow, square to round and pipe branch • The live drawing of every shape is free; the numbers, the ordinate table and the flat pattern are Pro • Clear line language: solid for cut, dashed for bend BUILT FOR FABRICATORS • Fraction keypad with true stacked fractions, in inches or millimeters • Every calculation runs on the device; no account, no sign-in, no internet needed • Save jobs and return to them later: three for free, unlimited with Pro • Recent parts one tap away, 15 languages • The free version shows a small banner under the catalog and, now and then, a full-screen ad before a free pattern. Pro removes both. EXPORT • Ordinates as CSV, or share the pattern as an image — free • DXF for CNC, plasma and laser cutting — Pro • True 1:1 PDF templates with a print calibration ruler, tiled across pages when the pattern is larger than the sheet — Pro UNBEND PRO One Pro, three ways to get it: a monthly subscription, a yearly subscription or a one-time lifetime unlock. Subscriptions renew until you cancel them in your store account settings; the lifetime unlock is charged once and never renews. Your purchase stays with your store account. Terms of Use: https://looplab.app/apps/unbend/terms-of-service/, https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://looplab.app/apps/unbend/privacy-policy

Screenshots

Sheet Metal Layout4 screens
Unbend Flat Pattern Calculator4 screens

Verdict

The call

The clearest difference is ads: Sheet Metal Layout at none against Unbend Flat Pattern Calculator's shown. Sheet Metal Layout also leads on device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Sheet Metal Layout sells 5 in-app purchases, starting at $1.49 per month and Unbend Flat Pattern Calculator sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sheet Metal Layout ships an update every 3 weeks, Unbend Flat Pattern Calculator every 2 weeks. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

Scorecard2 real differences Ā· 4 level
Sheet Metal Layout versus Unbend Flat Pattern Calculator: the parameters behind the verdict, then further details
ParameterSheet Metal LayoutUnbend Flat Pattern Calculator
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.4
Further details — not scored
Size30 MB60 MB
Age rating4+4+
DeveloperGun woo KimOmer Faruk BAGCI

In-app purchases

5 purchases

Sheet Metal Layout

Subscriptions2
  • Pro Monthly$1.491 Month
  • Pro Yearly$12.991 Year
One-time3
  • Lifetime Pro Ā· Supporter I$29.99
  • Lifetime Pro Ā· Supporter II$39.99
  • Lifetime Pro Ā· Supporter III$59.99
3 purchases

Unbend Flat Pattern Calculator

Subscriptions2
  • Unbend Pro Monthly$7.991 Month
  • Unbend Pro Yearly$24.991 Year
One-time1
  • Unbend Pro Unlock$29.99

Questions

Is Sheet Metal Layout free?
Sheet Metal Layout is free to download, with in-app purchases available.
Is Unbend Flat Pattern Calculator free?
Unbend Flat Pattern Calculator is free to download, with in-app purchases available.
Do Sheet Metal Layout or Unbend Flat Pattern Calculator have ads?
Unbend Flat Pattern Calculator shows ads; Sheet Metal Layout does not.
Which is updated more often, Sheet Metal Layout or Unbend Flat Pattern Calculator?
Sheet Metal Layout ships an update every 3 weeks, and Unbend Flat Pattern Calculator every 2 weeks. Most recently, Sheet Metal Layout was updated on November 6, 2026 and Unbend Flat Pattern Calculator on November 10, 2026.

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