IsoTool vs Unbend Flat Pattern Calculator

IsoTool includes a 7-day free trial for first-time users. Continued use requires a paid subscription. IsoTool is a tool for precise calculation of pipe and sheet-metal flat patterns for technical insulation, ventilation, and metal fabrication. Calculate flat patterns for pipes, bends, T-pieces, and transition pieces in seconds. The calculator generates an accurate pattern with all dimensions, ready to be transferred directly onto sheet metal or used as a digital reference. IsoTool is developed for professionals in technical insulation, ventilation, and sheet-metal work who need fast and accurate calculations without using complex CAD software. Features: • Calculates flat patterns for pipes, such as: bends, T-pieces, and transitions • Displays dimensions and angles in a clear, easy-to-read layout • Ideal for workshop, job site, or educational use With IsoTool, you get a practical and reliable tool that saves time, reduces errors, and ensures accurate results—every time. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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 • Single bend, multi-bend profiles, U channel, Z profile, hem and joggle • K-factor resolved from material and forming method, with a built-in R/T table • Set your own K-factor per material with the custom table (Pro) FLAT PATTERN DEVELOPMENT • Cone, truncated cone, cylinder, truncated cylinder and segmented elbow • Full ordinate table for marking out by hand • Pattern view with zoom and clear line language: solid for cut, dashed for bend BUILT FOR FABRICATORS • Fraction keypad with true stacked fractions, in inches or millimeters • Works completely offline, nothing is sent anywhere • Save jobs and return to them later • Available in 15 languages EXPORT • DXF for CNC, plasma and laser cutting (Pro) • True 1:1 PDF templates with a print calibration ruler (Pro) • Tiled PDF for patterns larger than the page (Pro) • Ordinates as CSV, or share the pattern as an image FAIR PRICING Every calculation is free and unlimited, forever. One single payment unlocks DXF export, 1:1 and tiled PDF templates, unlimited saved jobs and the custom K-factor table. No subscription, nothing renews, and the unlock 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