Terms of Service
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These terms govern your use of Kioku, the Japanese flashcard app developed by Kioku Corp. By creating an account or using the app you agree to them. If you do not agree, please do not use Kioku.
The service
Kioku helps you learn Japanese vocabulary, kana and kanji with spaced-repetition cards, practice games, streaks and rewards. Some features are free; others are part of the Kioku+ subscription or sold as virtual items. We may change, add or remove features to keep the app simple and useful.
Your account
You can use Kioku without an account; progress then stays on your device. Signing in with an e-mail code, Apple or Google lets you keep your progress across devices. You must be at least 13 years old. You are responsible for what happens under your account and for keeping your Apple/Google credentials safe. One account per person; accounts cannot be sold or transferred.
Kioku+, purchases and virtual items
Paid purchases and subscriptions are not available in this test version. Any days of Kioku+ access offered by the app do not start automatic billing.
Rubies, packs and other virtual items are licences to use content inside Kioku. They have no cash value, cannot be exchanged for money, and are lost if the account is deleted or closed for breach of these terms. Prices may change; changes never affect what you have already bought. Refunds follow our Refund Policy and the rules of each store.
Acceptable use
Do not reverse-engineer, copy, resell or scrape the app or its content; do not cheat the games, rankings or rewards; do not upload unlawful, hateful or infringing content to custom decks or reports; do not interfere with other users or with our servers.
Content and intellectual property
Kioku, its mascot Uni, artwork, lessons, audio and software belong to us or our licensors and are protected by copyright and trademark law. Stroke-order data comes from KanjiVG (© Ulrich Apel, CC BY-SA 3.0); balloon lettering uses M PLUS Rounded 1c (SIL OFL); Japanese voices are generated with Microsoft Azure neural voices.
Decks and sentences you create remain yours. You grant us a non-exclusive licence to store and display them so the app works for you. Reports you send may be used to fix the content.
Availability and changes
We try to keep Kioku running, but we cannot promise it will be available at all times or free of errors. We may update these terms; meaningful changes will be shown in the app and require your acceptance to continue.
Disclaimer and liability
Kioku is provided "as is" for personal learning. To the extent permitted by law we are not liable for indirect losses, lost data not backed up, or results in exams. Nothing here limits rights you have as a consumer under Brazilian law (Código de Defesa do Consumidor) or the law of your EU/EEA country.
Termination
You can stop using Kioku and delete your account at any time in Settings › Account. We may suspend or close accounts that break these terms, with notice when reasonably possible.
Governing law
These terms are governed by the laws of Brazil. Consumers keep the protection of the mandatory rules and courts of their place of residence.
Contact
Questions about these terms: support@appkioku.com.