Bushu Terms of Service

We grant you a personal, non-exclusive, revocable licence to install and use Bushu on devices you own or control, for your own studying. You may not resell the app, redistribute modified builds as if they were ours, or use our name, logo, or branding to imply endorsement.

The cards, notes, recordings, and images you create remain yours. We claim no rights over them, and because they never leave your device we could not act on them if we wanted to.

You are responsible for what you import. If you bring in a deck someone else made, respect its licence.

Bushu ships vocabulary, character and stroke-order data built from open sources. JMdict/EDICT, JmdictFurigana and KANJIDIC2 are published by the Electronic Dictionary Research and Development Group under CC BY-SA 4.0; Kanjium and CC-CEDICT are CC BY-SA 4.0; KanjiVG is CC BY-SA 3.0; example sentences from the Tatoeba Project are CC BY 2.0 FR; FrequencyWords is MIT; Make Me a Hanzi is under the Arphic Public License; Unihan and the Unicode Character Database are published by Unicode, Inc. under the Unicode licence.

Those licences travel with the data. If you republish content built from what Bushu bundles, the ShareAlike terms apply to what you publish. Bushu's own modified copies are offered under the same licences at mtsstudio.dev/bushu/corpus/, and each source and its licence is listed in the app under About → Sources.

Bushu grades its vocabulary into nine levels derived from how often each word appears in real usage. They are Bushu's own bands. They are not JLPT levels, they are not HSK levels, and Bushu is not affiliated with, endorsed by, or connected to the organisations behind either examination.

Bushu is provided as is. We do not warrant that it will be uninterrupted or error-free, that its scheduling will suit every learner, or that its dictionary data is free of the errors any dictionary contains.

Your study data lives only on your device. We cannot recover it, because we never have a copy. A backup file you save from the app is the only other copy, so deleting the app without one is final.

To the extent permitted by law, MTS Studio is not liable for indirect or consequential loss arising from your use of Bushu, including lost study data. Nothing here limits liability that cannot be limited by law.

We may update these terms; the date at the top changes when we do. You may stop using Bushu at any time by uninstalling it, which also deletes your data from your device.

MTS Studio can be reached through the contact page at mtsstudio.dev.