Open Source Notices

Last Updated: 2026-09-15

Kosaku Cards is built on the work of many open source projects and type designers. We are grateful to everyone listed below. Each item stays under its own license; the links point to the canonical source for the full terms.

Fonts Bundled in the App

MontserratSIL Open Font License 1.1
优设标题黑 YouSheBiaoTiHeiFree for commercial use, per the publisher

Fonts Available for Download

These are not shipped in the app. They are downloaded from our CDN only when you pick them, and stored on your device.

MiSansMiSans Font IP License (free for commercial use)
阿里巴巴普惠体 Alibaba PuHuiTi 3Alibaba PuHuiTi License (free for commercial use)
遍黑体 PlangothicSIL Open Font License 1.1(Derived from Source Han Sans)
霞鹜文楷 LXGW WenKaiSIL Open Font License 1.1
霞鹜新致宋 LXGW NeoZhiSongIPA Font License 1.0(Derived from IPAmj Mincho)
得意黑 Smiley SansSIL Open Font License 1.1
京华老宋体 JingHua LaoSongSee publisher terms
阿里健康体 Alibaba Health FontFree for commercial use, per Alibaba
巷萃大字体 Xiangcui DazijitiSee publisher terms

You can also add any font from Google Fonts (mostly SIL Open Font License 1.1), or upload your own font file. Uploaded fonts never leave your device.

Software Libraries

Direct dependencies of the app. Each one may pull in transitive dependencies under their own licenses.

animated_text_kitMIT
app_linksApache-2.0
auto_size_textMIT
awesome_extensionsMIT
cached_network_imageMIT
curl_logger_dio_interceptorMIT
device_info_plusBSD-3-Clause
dioMIT
file_pickerMIT
firebase_analyticsBSD-3-Clause
firebase_coreBSD-3-Clause
firebase_crashlyticsBSD-3-Clause
flex_color_pickerBSD-3-Clause
flextrasMIT
flutterBSD-3-Clause
flutter_animateBSD-3-Clause
flutter_easyloadingMIT
flutter_hooksMIT
flutter_image_compressMIT
flutter_localizationsBSD-3-Clause
flutter_markdown_plusBSD-3-Clause
flutter_spinkitMIT
flutter_svgMIT
flutter_svg_providerApache-2.0
flutter_useUnlicense
flutter_widget_from_html_coreMIT
fluttertoastMIT
galBSD-3-Clause
go_routerBSD-3-Clause
hooks_riverpodMIT
httpBSD-3-Clause
image_pickerBSD-3-Clause
infinite_scroll_paginationMIT
intlBSD-3-Clause
jiffyMIT
loggerMIT
lucide_icons_flutterMIT
mixpanel_flutterApache-2.0
onceMIT
package_info_plusBSD-3-Clause
path_providerBSD-3-Clause
permission_handlerMIT
pointycastleMIT
pretty_dio_loggerMIT
pretty_qr_codeMIT
purchases_flutterMIT
receive_sharing_intentApache-2.0
riverpod_annotationMIT
share_plusBSD-3-Clause
shared_preferences_riverpodMIT
slangMIT
slang_flutterMIT
sqfliteBSD-3-Clause
syncfusion_flutter_slidersSyncfusion Community License(Proprietary, not an open source license)
url_launcherBSD-3-Clause
uuidMIT

Corrections

If you are the author of anything listed here and a license is attributed incorrectly, or an attribution is missing, please tell us and we will fix it: hugo3641@gmail.com