Copybook Club
Acknowledgements

Licenses & acknowledgements

The fonts, libraries, and third-party components that help Copybook Club turn Chinese text into handwriting practice.

This page collects copyright notices, official source links, and applicable license information for components included in or used by the app — including fonts available with Pro.

Last updated: October 2, 2026

Third-party credits

What we credit

  • 01 Component name and copyright notice
  • 02 Official source, project, or vendor page
  • 03 License notice or applicable terms
Third-party notices

Fonts & software, fully credited

This catalogue covers typefaces and direct third-party software components used by Copybook Club, together with their copyright notices, licenses or applicable terms, and official sources.

Typefaces

Writing and interface fonts

These font projects provide Chinese writing options and the branded interface typography used across Copybook Club.

01

Chinese writing font

Noto Serif CJK

Noto Serif CJK is identified in Copybook Club as the Print Classic Chinese writing option.

Copyright The Noto Project Authors / Adobe / Google
License SIL Open Font License 1.1
Source github.com/notofonts/noto-cjk
02

Chinese writing font

Ma Shan Zheng

Ma Shan Zheng is used as one of the Chinese writing fonts available in Copybook Club.

Copyright Copyright 2018 The Ma Shan Zheng Project Authors
License SIL Open Font License 1.1
Source github.com/google/fonts/…/mashanzheng
03

Chinese writing font

ChenYuluoyan Thin

ChenYuluoyan Thin is used as one of the Chinese writing fonts available in Copybook Club.

Copyright Copyright (c) 2022, Wang, Li-Yu and Liu, Wei-Chen
License SIL Open Font License 1.1
Source github.com/Chenyu-otf/chenyuluoyan_thin
04

Chinese writing font

Maoken YingBiKai ShuJ

Maoken YingBiKai ShuJ is used as one of the Chinese writing fonts available in Copybook Club.

Copyright Copyright Maoken Fonts Project Authors
License SIL Open Font License 1.1
Source github.com/maoken-fonts/MaokenYingBiKaiShuJ
05

Display name in the app

Round Hand

Round Hand is the display name used in Copybook Club for the JasonHandwriting1 font variant.

Font JasonHandwriting1
Copyright JasonHandwriting Project / Jason (Yu Ching Sung)
License SIL Open Font License 1.1
Source github.com/jasonhandwriting/JasonHandwriting
06

Interface font

Onest

Onest is bundled for interface text, controls, plan details, and branded content across Copybook Club.

Copyright Copyright 2021 The Onest Project Authors
License SIL Open Font License 1.1
Source github.com/simpals/onest
07

Display font

Sofia Sans Semi Condensed

Sofia Sans Semi Condensed is bundled for prominent headings, large numerals, and branded display typography.

Copyright Copyright 2019 The Sofia Sans Project Authors
License SIL Open Font License 1.1
Source github.com/lettersoup/Sofia-Sans
08

Metadata font

Anonymous Pro

Anonymous Pro is bundled for metadata, compact labels, counters, and selected branded interface details.

Copyright Copyright 2009 Mark Simonson
License SIL Open Font License 1.1
Source marksimonson.com/fonts/view/anonymous-pro

Software components

Software libraries

Copybook Club v1.3 directly integrates these third-party packages for document import and Ink Rush review scheduling.

09

Document import

ZIPFoundation

ZIPFoundation supports archive handling used by Copybook Club when reading supported document imports.

Version 0.9.20
Copyright Thomas Zoechling / Peakstep
License MIT License
Source github.com/weichsel/ZIPFoundation
10

Ink Rush scheduling

swift-fsrs

swift-fsrs provides the scheduling implementation used by Ink Rush to calculate review timing for handwriting practice.

Revision 4fbaf20184d6
Copyright Copyright 2023 Ben Smiley
License MIT License
Source github.com/open-spaced-repetition/swift-fsrs

Shared license

SIL Open Font License 1.1

The fonts listed above are released under the SIL Open Font License, Version 1.1. It permits use, study, copying, embedding, modification, redistribution, and bundling with software, subject to the license conditions.

Read the official license text ↗

Software license

MIT License

ZIPFoundation and swift-fsrs are released under the MIT License. Their copyright notices and permission notices must remain with copies or substantial portions of the software.

Read the MIT License text ↗

Page maintenance

Updates to this page

This page may be updated if Copybook Club adds, removes, or changes fonts, libraries, services, third-party materials, or applicable acknowledgements in a future version.

Note: All third-party names, copyrights, licenses, and terms belong to their respective authors, projects, and providers. Inclusion on this page does not imply endorsement of Copybook Club by those parties.

Licenses & credits

Need a closer look?

If you need clarification about a typeface, software component, source link, license notice, or applicable service terms, email us. We’ll help you find the relevant acknowledgement or original project.