# SeamShift: Pattern Alterations — Sewing fit math & worksheets

> Sewing fit math & worksheets (iPhone/iPad app by Jasko Hodzic.)

- Source: https://appshunter.io/ios/app/seamshift-pattern-alterations/id6790248728 (this page in markdown: same URL + `.md`)
- Developer: [Jasko Hodzic](https://appshunter.io/developer/6780306802)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, French (France), German (Germany), Italian, Brazilian Portuguese, European Spanish
- Released: 2026-07-21
- Data updated: 2026-08-02
- User reviews in markdown: https://appshunter.io/ios/app/seamshift-pattern-alterations/id6790248728/reviews.md

## What is SeamShift?

SeamShift turns body measurements and finished-garment measurements into clear, repeatable pattern-alteration worksheets. Choose an alteration, see the exact formula and assumptions, follow a vector diagram, and keep the result with your sewing project. Includes full- and small-bust worksheets, waist-to-hip blending, length changes, shoulder width and a user-entered sway-back worksheet. Export PDF worksheets and CSV calculations, or create a validated JSON backup. SeamShift does not create copyrighted patterns and does not promise a perfect fit: always follow the pattern instructions and sew a test garment before cutting final fabric. No account, ads, tracking or developer server.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://viralcrew.de/apps/seamshift/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SeamShift Pro Monthly | $3.99 | per month |
| SeamShift Pro Yearly | $17.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| SeamShift Pro Lifetime | $29.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-21

No release notes.

## More apps by Jasko Hodzic

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- [KerfMate: Cut List Optimizer](https://appshunter.io/ios/app/kerfmate-cut-list-optimizer/id6790028605)
- [CrumbCost: Recipe Costing](https://appshunter.io/ios/app/crumbcost-recipe-costing/id6790029191)
- [SpoolMargin: 3D Print Cost](https://appshunter.io/ios/app/spoolmargin-3d-print-cost/id6790029336)

All apps by Jasko Hodzic: https://appshunter.io/developer/6780306802

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-02.*