Privacy Policy for Manga Folio
Last updated: October 11, 2026
Cloud Translation
Cloud translation is enabled by default from the first launch. You can switch between cloud translation and on-device translation in the Application’s settings at any time. When you use cloud translation, the Application sends the following data to the Service Provider’s server:
- Text to be translated: text used to provide translation, such as dialogue and bookmark titles.
- An app-generated identifier (UUID): the Application generates and stores this identifier to distinguish requests for usage management and abuse prevention. It does not contain your name or Apple ID, but requests using the same identifier can be associated with one another.
- Source and target languages: used to specify the languages for translation.
The text to be translated is sent from the Service Provider’s server to Google’s Gemini through Google Cloud (Vertex AI). Source images and entire book files are not sent for cloud translation.
When automatic cloud translation is enabled, text to be translated is sent automatically as pages are displayed or prefetched. You do not need to press a translation button for each page.
Translation Settings and Local Processing
On-device translation processes text locally. When this mode is selected, the Application does not send the translation text, app-generated identifier (UUID), or language selections to the Service Provider’s server for cloud translation. Image viewing takes place on your device.
To use on-device translation, select it in settings before translating. Cloud translation requires sending data to a server; it is not entirely on-device processing.
Third-Party Translation Service and Data Use
Cloud translation sends text to Google’s Gemini through Google Cloud (Vertex AI) for translation processing. The Service Provider does not use the app-generated identifier (UUID) or translation content for AI training or quality improvement, and uses Gemini under conditions in which submitted data is not used for those purposes.
Data Retention Policy
As a general practice, the Service Provider does not retain the app-generated identifier (UUID), translation text, language selections, or translation results on its server after processing. However, server logs may remain, and information associated with translation requests may be recorded in those logs. This is not a guarantee that no data is retained.
The app-generated identifier (UUID) is stored by the Application on your device. For questions about retained logs or requests concerning your data, please contact the email address below.
Children’s Privacy
The Application does not knowingly collect personal information from children under the age of 13. The cloud translation data processing described above also applies when this feature is used by a child.
Changes
This Privacy Policy may be updated from time to time for any reason. Any updates will be posted on this page. Continued use of the Application after changes are made constitutes acceptance of the revised policy.
Your Choices
When you use cloud translation, your app-generated identifier (UUID), translation text, and language selections are processed as described in this policy. Cloud translation is enabled by default; you can choose on-device translation in settings before using translation, including automatic translation, if you do not want to send this data for cloud translation.
Contact Us
If you have any questions regarding privacy while using the Application, please contact the Service Provider at: