For iPad · iPhone · Mac

Draft. Grade.
Sew perfectly
in your size.

SewGrader is the digital drafting table made for sewists — from hobby to semi-pro. Photograph your old paper patterns, trace them in seconds, grade to any size, and print anywhere.

Download on the App Store See how it works ↓

✂️ 📱 App Screenshot — Hero view

📐

Grading engine One pattern,
all sizes

📸

Trace from photo Paper → digital
in seconds

Scroll

📜 📸 Video/foto — papírové střihy na stole,
přechod do digitálního canvasu

∞

sizes from
one pattern

The story

Pattern making
was always an art.
Now it's precise.

For generations, sewists measured, drew, and cut paper. Beautiful, tactile — but inflexible. Changing a size meant starting over. Fixing a curve meant wasting paper. SewGrader brings the drafting table to your iPad without losing the craft.

"Nothing like this existed. Professional CAD tools cost thousands and were built for factories, not home sewists. We built SewGrader for the person between the two."

Digitize the analog

Your old patterns
deserve a
second life.

That pile of paper patterns handed down from your grandmother? Photograph them, import into SewGrader, calibrate to real size using any ruler in the shot, and trace over them with a Pencil or finger. In minutes you have a perfect digital original — ready to grade, edit, and print forever.

Photograph the pattern

Place the paper piece flat, include a ruler or known measurement for scale. Any camera works.

Import & calibrate

SewGrader maps pixels to real centimeters using the measurement you provide. No special setup needed.

Trace with Pencil or finger

Draw over the photo in Polygon or Freehand mode. Bezier curves snap to the original contours.

Delete the photo, keep the piece

Remove the background image. Your digital piece is accurate, scalable, and ready to grade.

📸 Short video — trace workflow

The centrepiece feature

One pattern.
Every size.
No extra work.

Grading is the professional technique of scaling a pattern to different sizes. In SewGrader, you set up your size system once — standard presets or your own body measurements — and the grading engine handles the rest. Preview all sizes at once, export just the ones you need.

📐 Screenshot — grading overlay,
všechny velikosti najednou na canvasu

📏

Standard size presets

Built-in EU/US/UK women's, men's, and children's size charts. Pick a standard and grade instantly.

👤

Custom measurement profiles

Enter your own body measurements or a client's. SewGrader interpolates a perfectly fitted grade.

🎛️

Per-node sensitivity

Control how much each node moves with size changes. Collar stays tight while the hem flares — exactly how you want it.

Everything you need

A real CAD tool.
Built for sewists.

Not a simplified toy — a complete pattern drafting environment designed from the ground up for touch, Pencil, and the specific needs of sewing.

✏️

Precision drawing tools

Polygon, rectangle, circle, freehand — draw any pattern piece from scratch. Pull Bézier curves, split edges, merge nodes. The full vocabulary of technical pattern drafting, in your hands.

⚙️

🪡

Seam allowance

Add precise offset seam allowances to any piece with a slider. See the allowance visually rendered in real time.

Real-time preview

🔗

Live Mirror (Linked Clones)

Create a mirrored copy that stays in sync. Edit the front bodice and the back updates automatically.

Symmetry built-in

✂️

Scissors (Cut) tool

Draw a freehand cut line across any piece to split it — perfect for dart manipulation and seamline changes.

Dart manipulation

🗂️

Layers

Organize pattern pieces across color-coded layers with independent visibility, locking, and snapping. Shell, lining, and interfacing — all in one file, never confused.

🗂️

Shell · Lining · Interface

📌

Notches, grainlines & symbols

Slit notches, drill holes, buttons, fold lines — all the professional annotation a finished pattern needs.

Production-ready

📐

Measure tool

Measure any distance or angle directly on the canvas in real-world centimeters. Check seam lengths match before you cut.

⚡

Boolean merge

Merge overlapping pieces into one clean outline. Essential for constructing complex multi-part pieces.

Advanced workflow

🔮

Projector calibration

Calibrate SewGrader to project your pattern directly onto the floor at 1:1 scale. Cut without printing a single page.

Coming soon

No plotter needed

Print on any
home printer.
Tape & sew.

SewGrader's tiled PDF export intelligently splits your pattern across A4 or Letter sheets with registration marks at every corner. Match the crosshairs, tape the pages together, and you have a full-size pattern — no print shop, no plotter required.

📄

Smart tiling with paper format outlines

See exactly how your pieces land across A4, Letter, A3, or custom sheets. Rearrange pieces for the fewest pages possible.

✚

Registration marks & page numbering

Crosshair marks at every corner make assembly foolproof. Page numbers tell you exactly where each sheet goes.

⚙️

Print only what you need

Export a single size, a single layer, or specific pieces. No wasted pages.

Video — tiled PDF export workflow

Build your collection

Your pieces.
Forever reusable.

The Piece Library is your personal collection of ready-made building blocks. Drafted a perfect sleeve once? Save it. In the next project, import it from the library and you're already halfway done. Tag and categorize everything to find it in seconds.

✓ Save any piece with tags and categories

✓ Search by name, type, or tag

✓ Import at viewport center, ready to use

✓ Share libraries across your devices

Front bodice

Puff sleeve

Collar

A-line skirt

Patch pocket

Waistband

Outputs & ecosystem

From SewGrader
to anywhere.

Export your work in the format that fits your workflow — home printer, digital cutter, professional software, or straight to the floor.

📄

Tiled PDF

Multi-page PDF with registration marks. Print on any home printer, A4 or Letter.

🗃️

SVG Export

Clean vector export for Illustrator, Inkscape, digital cutters like Cricut or Silhouette.

🔲

DXF Export

Industry-standard format for professional pattern plotters and CAD software.

🔦

Projector mode

Calibrate a projector to beam your pattern at 1:1 scale directly onto fabric on the floor.

Made for you

Who sews
with
SewGrader?

🧵

Hobby sewists

You have a stash of paper patterns and a sewing machine. SewGrader lets you finally fit them to your own measurements, print cleanly, and build a library of your favourite pieces.

📐

Pattern makers & designers

You draft your own patterns but are tired of hand-scaling for different sizes. SewGrader's grading engine turns a one-size draft into a full size run in minutes.

👗

Custom & made-to-measure sewists

You make pieces fitted to individual clients. Enter their measurements as a custom profile and grade the pattern precisely to them every time.

📚

Teachers & students

Teach pattern making with digital tools that make the underlying geometry visible and editable. Students can experiment without wasting paper.

Draft. Grade. Sew perfectly in your size.

Pattern makingwas always an art.Now it's precise.

Your old patternsdeserve asecond life.