Last updated: November 12, 2026
1. Introduction
Please read these Terms of Use (the "Terms") before using the iOS app "BookDeck" (the "App") provided by T.K Apps ("we"). By using the App, you agree to these Terms.
2. What the App is for
The App is a reading log. You register the books you have read and the ones you want to read as a shelf, and record their status, ratings, memos and tags.
The App does not sell books. Book information is retrieved from external book search services, and we do not guarantee that it is accurate.
3. Your responsibility
You use the App at your own risk. Entering, managing and sharing your reading records, memos, photos, tags and exported data is your own responsibility.
4. Prohibited conduct
You must not:
- act unlawfully or against public order and morals
- infringe the rights, privacy, likeness or copyright of others
- interfere with the operation of the App or the external services it uses
- analyse, modify or reverse engineer the App
- do anything else we consider inappropriate
5. Data and backups
Your shelf and reading records are stored on your device. If you are signed in to iCloud, they are also stored in your own iCloud and synced between your devices. Data can still be lost if a device fails or is lost, if the App is deleted, or because of an operating system problem.
Export your shelf to a backup file or to CSV as needed, and keep and manage those files yourself.
6. Book information and external services
Book information and cover images in the App come from external services such as the Rakuten Books API. Search and cover display may stop working if those services change, pause or fail.
Links in the App such as "Rakuten Books" and "Amazon" may be affiliate links. Any purchase or transaction at the destination is between you and that service, under that service's own terms.
7. Photos
You must hold the rights or permission needed for any photo you register as a cover. Registering or sharing photos that infringe the rights of others is prohibited. Photos you register are stored only on your device.
8. In-app purchases
The App may offer a paid plan (Premium) that removes ads and unlocks CSV export.
- Purchases are made through the App Store (Apple).
- Subscriptions can be reviewed and cancelled in your App Store settings.
- Free trial periods, prices and renewal terms follow what is shown in the App Store. Billing begins automatically when a free trial ends.
- For refunds, please contact Apple Support.
- We may change or discontinue what the paid plan includes.
9. Advertising
The App may show ads to users on the free plan. Ads are hidden while a paid plan is active.
10. Changes, suspension and termination
We may change the App, add or remove features, or suspend or end the service without prior notice.
11. Disclaimer
Except where we have acted with intent or gross negligence, we are not liable for data loss, device problems, or any damage to you or a third party arising from use of the App.
We do not warrant the accuracy, completeness or fitness for a particular purpose of the book information shown in the App or of the content you record.
12. Privacy
For how information is handled in the App, please see our separate Privacy Policy.
13. Changes to these Terms
We may revise these Terms as needed. Revised Terms take effect when posted on this page. If you continue to use the App afterwards, you are deemed to have agreed to them.
14. Governing law and jurisdiction
These Terms are governed by the laws of Japan. The courts of Japan have exclusive jurisdiction over any dispute relating to these Terms.
15. Contact
For questions or comments about these Terms, please contact us.
T.K Apps
tkapps.support@gmail.com