PatternPlot: Trace & Grade
Sewing pattern grading
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
iPad
New: grade the built-in sample with no setup, then preview the Pro tiled PDF and nest before you buy. Deterministic, on device. 7-day free Pro trial.
PatternPlot turns a paper sewing pattern into an editable, true-scale vector on your iPad — then grades it into a full size run you define, deterministically.
Tracing a pattern got easy years ago. Grading — turning one size into a trustworthy run of sizes — is still the hard, trust-sensitive job. PatternPlot is built around that job, on device, with geometry you can audit.
FREE — real work, no subscription
• Photograph or import a paper pattern and trace it with Apple Pencil (or finger + numeric entry).
• Import your own vector artwork (SVG) at true scale — free, because it is how you get your work in.
• Edit true-scale vector pieces: add seam allowance per edge, notches, and grainlines.
• Export true-scale tiled PDFs and A0 — with a 50 mm calibration square and registration marks so your print is exactly to scale.
• Grade YOUR piece: mark a reference point and an axis, type how much each size grows, and see the whole run nested on screen.
• A quality report on every graded size: drift beyond the safe grade range, collapsed edges, and self-intersections.
• Export the base size — the size you drafted — at any time.
No purchase is required to do any of this. Basic export is never locked behind a paywall.
PRO GRADING — the paid tier
• A tiled PDF for every size in your run.
• A vector outline of every piece at every size.
• A nest of the whole run on one sheet.
• Every piece of the garment in each file, not just one.
• A spreadsheet of what every declared seam measured, size by size.
• Your grade corrections saved to a file, so another garment can use them.
The vector files carry the stitching outline only — no seam allowance, notches or grainline.
Reading a saved corrections file back into a pattern is free; only writing one is Pro.
HONEST BY DESIGN
The grade is deterministic geometry computed on your device. AI never touches your measurements: no coordinate, seam allowance, notch position, or graded measurement is ever produced by a model.
PatternPlot also tells you when a size drifts beyond a safe grade range, so you can re-check proportions before cutting fabric. We describe this as garment-aware grading — not a fit guarantee.
REQUIRES: iPad on iPadOS 17 or later. Apple Pencil recommended but not required.
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Pro Grading subscription: $79.99/year after a 7-day free trial. Payment is charged to your Apple ID at confirmation of purchase. It renews automatically unless turned off at least 24 hours before the end of the period; manage or cancel anytime in your Apple ID Account Settings. Trace, vector edit, seam allowance, notches, grainline, and tiled/A0 PDF export are free and do not require a subscription.
Privacy Policy: https://amtyurin.github.io/patternplot/privacy-policy.html
Terms of Use: https://amtyurin.github.io/patternplot/terms-of-use.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Try the sample first. The built-in sample piece now grades itself, so you can see a whole size run, and what Pro writes, without tracing anything. Find it at the end of the introduction, or any time under Help → Try the sample. Its sizes are synthetic examples.
See the Pro files before you buy. A watermarked preview shows page 1 of a size's tiled PDF and the nest of the whole run, drawn from your own graded run or from the sample.
Tell us what you are making. Help → Send feedback opens a short email to us. Nothing is sent unless you send it.
One Help menu, with the support page and Restore Purchases.
The developer, Andrey Tyurin, 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:
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrey Tyurin
- Size
- 2.9 MB
- Category
- Graphics & Design
- Compatibility
Requires iPadOS 17.0 or later.
- iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPad
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Grading $79.99
- Copyright
- © 2026 Andrey Tyurin
