Privacy

Updated October 24, 2026

Bookfy has no account of its own, shows no ads and does no tracking. Your books, highlights, bookmarks and progress stay on your device. Only what is listed below leaves the device, and only when you use that feature.

Sync

If you turn on sync, the app stores in your own cloud (Google Drive, OneDrive or Dropbox, whichever you choose) your progress, highlights, notes, bookmarks and shelves and, on Wi-Fi, a copy of your books. It asks each service for the smallest permission: on Google Drive the app only sees the files it created itself; on OneDrive and Dropbox, only its own folder (Apps/Bookfy). Nothing goes to a Bookfy server. Turning sync off does not delete what is in your cloud.

Bookfy's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

AI features

When you ask for a summary or an explanation, or ask a question, the app sends the book's title and author, the chapter name, the chapter text up to where you are (never what comes after), the passage or question, the last turns of the conversation, the device language and a random number generated in the app to count the daily limit. The request goes through a Bookfy server (Cloudflare) to Anthropic, which writes the answer. The Bookfy server does not keep the text; the counters are cleared the next day. Anthropic handles the data under its own policy.

Dictionary

When you look up a word, it is sent to Wiktionary (Wikimedia), which returns the definition.

Translation

Translation runs on the device, with Google's on-device translator (ML Kit): the passage does not leave your phone. The first time you use a language, its model is downloaded from Google. "Open in Google Translate" sends the passage to Google's app or website.

Voice

Read-aloud uses Android's voices. Some voices on the device work over the internet, depending on the installed speech engine.

Your rights

You can delete everything the app keeps: removing a book deletes the file, its cover and its AI conversation; highlights and bookmarks can be removed one by one; uninstalling the app deletes everything. Sync files stay in your cloud account, where you can delete them. Questions and requests: helpbookfy@gmail.com.

Terms of use

What Bookfy is

A reader for the ebooks, comics and audiobooks you already have. The app does not sell or lend books: it opens the files you choose.

Your files

You are responsible for the files you open in the app. DRM-protected files do not open.

AI features

Summaries, explanations and answers are generated by artificial intelligence and may contain mistakes. There is a daily usage limit.

No warranty

The app is provided as is. Keep copies of your books and notes: the app stores everything on the device and, if you turn on sync, in your cloud.

Changes

These terms may change with new versions of the app. The version in effect is the one on this page.