ClickBook for iPhone/iPad - offline EPUB reader that explains any word you tap

[clickbook]

Hi all,

I'm the developer of ClickBook, a free EPUB reader for reading books in a language you are still learning. Tap any word you don't know and a small panel explains what it means in that sentence, with an example, so you can stay in the book instead of switching to a dictionary.

The iPhone and iPad version works a little differently from Android, so here is what is specific to it:

• The language model (a quantised Gemma 4 E2B, run with llama.cpp) ships inside the app. Nothing is downloaded at first launch, and it works offline, airplane mode included, from the very first start
• The trade-off: the app is large in the App Store (the model alone is about 1.84 GB), and it needs an A12 Bionic chip or newer with iOS / iPadOS 15.1 or later
• Open EPUBs from Files or iCloud Drive, or a PDF with real text (converted on import; scanned PDFs can't be read)
• On iPad you can read one page at a time or as a two-page spread
• Free, no account, no ads, no tracking. Your books and lookups stay on the device; the only exception is the optional Ask ChatGPT button (Pro), which sends a word and its passage only when you tap it, and asks first

Pro is a one-time in-app purchase of US$12.99 (local prices vary), not a subscription. It adds explanations in your own language and passage translation. No DRM-protected books, so Apple Books and Kindle purchases won't open.

The full feature list and the general discussion are in the Android thread: ClickBook on Android

App Store: https://apps.apple.com/app/id6796281610

I'll be following this thread too, for anything specific to iPhone and iPad. Questions and bug reports are welcome here or at support@clickbook-ai.com.