HSK Nest is built on outstanding open datasets. This page credits them as their licenses require — and because they deserve it.
The HSK 1–9 and frequency word lists are derived from complete-hsk-vocabulary by Yanis Zafirópulos, used under the MIT License.
Word-entry suggestions for Chinese lists are powered by CC-CEDICT, © the CC-CEDICT editors and contributors, used under the Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0). Our trimmed build of the dictionary data is shared under the same license in the open-source repository.
Chinese–English example sentences come from Tatoeba (via the manythings.org sentence pairs), used under the CC-BY 2.0 (France) license. Each sentence stores its individual attribution (sentence IDs and contributor usernames), preserved verbatim in the app's database and data files.
HSK Nest itself is open source under the GNU AGPL-3.0 license — source code on GitHub.