For iPad · iPhone · Mac

Your patterns.
More possibilities.
Less redrawing.

Turn the paper patterns you love into a library you can edit and reuse. Or start with a garment drafted from your measurements. Adjust, compare sizes and take your next project to the cutting table.

Coming to the App Store See how it works ↓

Ask about the launch

One purchase. No subscription. Works with no signal.

Animated app illustrations

The SewGrader canvas: a t-shirt pattern with front, back, sleeve and neckband, seam allowances, grainlines and notches, with the tool panel, layer panel and context bar around it.
Grading engine One draft,
every size
Trace from a photo Paper → digital
in minutes
Scroll
Animated app illustrations: Circle skirt · 74 cm · 58 cm · 4 × Skirt panel
6
garments that
draft themselves
Where a project starts

From an idea
to a pattern.
With your measurements.

Pick a garment: skirt, t-shirt, sweatshirt, shirt, dress or trousers. Give it the two or three measurements it needs. The pattern is drafted to them, and every piece is labelled with what to cut. It lands on a drawn length of your own fabric width, so you see whether it fits the bolt before you buy it. Or start on an empty canvas and draft it yourself.

Keep the work you have already done. Change a length, reuse a sleeve or make another size without starting again on paper.

Digitise the analogue

Your old patterns
deserve a
second life.

That pile of paper from your grandmother. The pattern you traced off a magazine sheet in 2009. Photograph it and bring it in. Tell the app how long one line in the photo really is, then draw over it. In minutes you have a digital original — one that grades, edits and prints forever.

01

Photograph the piece

Lay the paper flat and get a ruler, or anything of known length, in the shot. Any camera will do.

02

Calibrate it to real size

Draw a line along the ruler in the photo and enter its actual length. This sets the image to the correct scale.

03

Draw over it

Trace with a Pencil or a finger. Hold at the end of a freehand stroke and it snaps to the shape you meant, or place points exactly by typing coordinates.

04

Delete the photo, keep the piece

The background image goes. What is left is a real piece — measurable, gradable, and printable at any size.

A photographed paper pattern used as a tracing underlay, with a calibration line laid along the ruler in the shot and a digital outline being drawn over the printed one.
The centrepiece

One draft.
Every size.
No second draft.

Built-in garments can be redrafted from another person’s measurements. For patterns you draw or trace, set the grading rules and check the result. A size chart is a starting point; fit also depends on the design, fabric and ease.

One bodice shown as a nest of eight graded sizes, beside the size table that produced them and a saved measurement profile.

Standard size charts

EU, US, UK and JP women's charts, plus men's and children's. Pick one and the size run is there.

The people you sew for

Measurements outlive projects, so they live in the app rather than in a file. Take your sister's at Christmas and grade to her all year.

Rules per node, links per edge

For hand-drawn and traced patterns, control how each point moves between sizes and check the seams before cutting.

Everything else

Room to adjust.
Before you cut.

Keep the work you have already done. Change a length, reuse a sleeve or make another size without starting again on paper.

Draw freehand, or type the number

Polygon, rectangle, circle, and freehand that snaps to the shape you meant when you hold at the end of a stroke. Pull Bézier curves, split edges, merge nodes. And when a line has to be exactly right, type it — the command bar takes coordinates, relative offsets and length-at-angle, with ortho and polar tracking.

An armhole curve zoomed in with a Bézier handle pulled out of one node, and the command bar accepting a typed length and angle.

Seam allowance

A width for the piece, an override for any single edge, and a corner treatment where two of them meet. Drawn as you change it.

Per-edge control

Live Mirror

A mirrored copy that stays in sync. Edit one side and the other follows, so a symmetrical piece is edited once.

Symmetry built in

Cut, slash and spread

Divide a piece with a straight, segmented or freehand cut. Spread the sections radially to adjust darts or add fullness.

Dart manipulation

Layers

Shell, lining and interfacing in one file, each on its own colour-coded layer with its own visibility, lock, snapping and default seam allowance. Export one layer and leave the rest behind.

The layer panel with shell, lining and interfacing layers, each with its own colour, visibility and lock.
Shell · Lining · Interfacing

The markings, drawn as themselves

Notches, grainlines, drill holes, darts, fold lines, buttons, internal lines and dimensions. Every icon is drawn as the mark itself — the same symbols already printed on the patterns you buy. Nothing to decode.

Production-ready

Measure anything

Measure distances in centimetres, millimetres or inches, and angles in degrees, directly on the canvas. Check that seams match before cutting.

Boolean merge

Fuse overlapping pieces into one clean outline — how a multi-part piece becomes a single thing to cut.

Advanced workflow

Restore Backup

Work saves as you go and rotating backups are kept for every project, reachable from a button on the project card. A lost drawing is an afternoon; a lost pattern is a body's measurements you may not be able to take again.

Backups, not hope
Build your collection

Your pieces.
Reusable for good.

The piece library is your own set of building blocks. Drafted a sleeve that finally fits? Save it. Next project, bring it in and you start halfway. Categories and tags are how you find it again in a year.

Save any piece with a category and tags
Search by name, type or tag
Imports at the centre of your view, ready to place
Export the whole library as one file — to another device, or to keep
Front bodice
Puff sleeve
Collar
A-line skirt
Patch pocket
Waistband
Outputs

From SewGrader
to anywhere.

Four export options for different workflows. Choose the one that suits yours.

Tiled PDF

Multi-page, registration-marked, page-numbered. Any home printer, any common paper size.

SVG

Clean vectors for Illustrator, Inkscape, and cutters like Cricut or Silhouette.

DXF

The format professional plotters and pattern CAD read. Hand a file to a print bureau and it opens.

Projector & cutting guide

1:1 on the floor, or the numbers to mark straight onto folded cloth. For the garments that never needed paper.

Made for you

Who sews
with
SewGrader?

Home sewists

Turn the paper patterns you love into a library you can edit and reuse.

Pattern makers and designers

You draft your own and are tired of scaling by hand. A one-size draft becomes a full size run in an evening, with the rules visible and yours to change.

Made-to-measure sewists

Keep measurements for the people you sew for and reuse them in your next project.

Teachers and students

Teach the geometry with the geometry visible and editable. A class can try five ideas without spending five sheets of paper.

Eighteen languages

Including the part
most apps forget.

Menus are the easy half. SewGrader is translated all the way down — including the labels printed onto the pattern itself, the cutting guide and the command bar. Those are the three places a translation usually stops.

One price

One purchase.
For your next projects.

SewGrader is a single purchase. No trial that expires. No further in-app purchases. And no monthly charge for an app you use in bursts — three evenings this month, none in July, a whole weekend in September.

24.99 USD once

The final price will appear in your local currency on the App Store.

  • No subscription. There is no monthly plan to choose, because there is only one thing to buy.
  • No account. Nothing to sign up for, nothing to be locked out of.
  • No ads, no tracking. Nothing inside the app watches what you do, and nothing reports it anywhere.
  • No cloud you depend on. Your patterns are files on your device. Sew on a plane, in a class, at a cottage with no signal.
  • No AI-generated patterns. Patterns are constructed from geometric rules rather than generated by AI.

SewGrader is in preparation. The planned price is shown here; the final price will be confirmed when the app launches.

Get started

Your drafting table
is waiting.

On iPad, iPhone and Mac. The iPad is the one the interface is tuned for.

Coming to the App Store

One purchase · No subscription · Apple Pencil optimised