SignatureFold

From sheet to signature

Design nested layouts, validate fold order, place sewing stations, and export sheets that match how paper actually folds.

Atelier capabilities

Four studio rooms—library, imposition, folding, binding—connected by one offline project archive.

01

Real page imposition

Map source pages onto physical sheets with nested folio and quarto layouts—front and back panels computed, not guessed.
02

Folding Lab steps

Walk validated fold sequences with mountain and valley cues so the reading order matches the assembled booklet.
03

Sewing & cover plans

Place stations along the spine, estimate book-block thickness, and export punching guides plus cover templates at true scale.
04

Print-ready exports

Generate imposed PDFs, duplex test sheets, and project reports—print at 100% scale and verify alignment before the full run.

Studio on film

Swipe the strip—each frame is a working surface from the SignatureFold atelier.

Privacy & Support

Clear practices for an offline craft tool. Contact us anytime with questions about the app.

Privacy Policy

SignatureFold is built as an offline bookbinding studio. Projects, PDFs, and settings stay on your device. We do not operate accounts, analytics dashboards, or advertising networks inside the app.

Information we process

Documents and images you import, imposition layouts you create, and preferences you choose are stored locally in the app sandbox. SignatureFold does not require sign-in and does not sync your book projects to our servers.

Network use

The app is designed to work without a network connection for core imposition, folding, and binding workflows. If the operating system or App Store frameworks transmit diagnostic data, that handling is governed by Apple’s policies, not by SignatureFold servers.

Children

SignatureFold is not directed at children under 13. We do not knowingly collect personal information from children.

Changes

If this policy changes, we will update this page with a revised effective date. Continued use after an update means you accept the revised policy.

Effective date: November 9, 2026

Support

Questions about layouts, exports, or privacy? Email honglinzhang@langfolinlimited.org. We aim to reply within a few business days.