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| Decision field | Free + paidPattern TestersGlobalRemove | Free downloadSeamly2DGlobalRemove | Open accessCanadian Quilters Association Quilt ShopsCanada · North AmericaRemove | Open accessPattern Grading & Size-Run Validation RecordGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Choose materials | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Patterns & fit | Patterns & fit | Materials | Patterns & fit |
| Best for | Coordinating an independent sewing-pattern test | Digital pattern drafting | Finding association-listed quilt shops and studios within Canada | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence |
| Know before using | The interface and plan description do not prove tester reach, completion, feedback quality, fit validity, export quality, uptime, support, or suitability for an established release process. Measurements and photos can be sensitive personal data. Run a non-critical pilot, review the current privacy and service terms, define consent and photo rights, test exports and deletion, and keep pattern approval and release responsibility with the designer. | Patternmaking knowledge, controlled measurement files, production conventions, and sewn fit testing are still required. The software does not validate body measurements, ease, balance, grading rules, fabric behavior, construction, or product fit. The project currently labels its user wiki manual as needing updates, so confirm current commands and file behavior against the installed release and active support channels. | It is an association list of participating businesses rather than a complete Canadian shop census; confirm the shop type, inventory, address, opening, online ordering, shipping, and service quality directly. | The record does not create a production grade, supply universal increments or breakpoints, validate a CAD file or fit population, reproduce licensed standards, or replace qualified anthropometric, pattern, technical-design, fit, quality, accessibility, safety, statistical, and user-research review. |
| Practical access | ||||
| For | Apparel brands | Both | Makers | Apparel brands |
| Location or jurisdiction | Global | Global | Canada · North America | Global |
| Access | Free + paid | Free download | Open access | Open access |
| Format | Software | Software | Directory | Stitch Authority |
| Source type | First-party platform | Open-source project | Industry organization | Stitch Authority |
| Source and review | ||||
| What the source establishes | Pattern Testers currently offers application intake, tester selection, feedback, photos, approvals, issue tracking, revisions, a reusable tester directory, and release deadlines. The public pricing page shows a limited free plan and paid Pro and Business tiers. Its June 2026 privacy policy lists names, email addresses, measurements, photos, feedback, application history, and assignments among the data processed. | The maintained Seamly2D repository identifies the application as GPLv3+ open-source patternmaking software for Windows, macOS, and Linux. It reads multi-size measurement files for standardized sizes and individual measurement files for custom-fit work, publishes downloadable builds and releases, and links an active website and user forum. | The current CQA/ACC page exposes thirty-three shop profiles and province or territory filtering across Canada, with named locations and linked business detail pages. | The guide cites current ISO body-table, size-designation, and garment-measurement boundaries plus two peer-reviewed studies that tested the relationship between conventional grade rules, anthropometric evidence, and garment fit; it requires product-specific target deltas and validation instead of publishing universal increments. |
| Linked page reviewed | Jul 21, 2026 | Jul 21, 2026 | Jul 16, 2026 | Jul 27, 2026 |
| Next review due | Jan 17, 2027 | Jan 17, 2027 | Jan 12, 2027 | Jul 27, 2027 |
| Inspect | ||||
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