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Read any book.
Understand every word.

  1. 1. Point your camera at any book page and snap.
  2. 2. Annotations stream to your screen in seconds.
  3. 3. Tap any highlight for a full explanation.
Download on the App Store
PhotoLang app showing camera scan and annotated page
Page summary view
Summarize
Pages Understand
Vocabulary
Vocabulary sheet view
Summarize Pages and Understand Vocabulary views
AI Annotations

Every phrase, explained in detail.

40-70 word explanations per phrase
Every highlighted phrase gets a full breakdown: what the device is, why the author used it here, and what it signals to the reader in the broader story.
Book-aware page summary
Switch to the Summarize tab for a full page summary grounded in the story arc - not just the passage, but how it fits into the novel as a whole.
20+ vocab words, every page
Grade 9+ vocabulary words pulled from the page, defined in plain language and organized so you can study them at a glance.

Detailed 40-70 word breakdowns for every highlight, a full page summary, and 20+ vocab words, all grounded in your specific book.

Tap to explore

Tap any highlight for a full breakdown.

Streams in real-time
Highlights appear across the page as the AI generates them. Annotations start appearing in under 2 seconds - no waiting for a full load.
Book automatically identified
The model fingerprints your text and grounds every annotation in the context of the full novel, referencing earlier chapters, character arcs, and running themes.
MLA citations on every quote
Every highlighted phrase includes a formatted MLA citation ready to paste directly into an essay or paper - no manual formatting needed.

Tap any highlight for a full breakdown. Streams in real-time, knows your book, and includes MLA citations ready to paste.

Annotation popup showing phrase breakdown Annotation popup showing phrase breakdown
Reviews

What testers are saying.

From students who actually use it.

★★★★★

"my friend made me review his app and i thought it would be slop, but this actually helped me and my reading comprehension, my teacher makes me read some very confusing books and when i use photolang to help analyze them its like i unlock a new understanding of the page at hand, indubitably"

- Hassaan K., 10th grade English student
★★★★★

"I'm reading in English but it's not my first language. The vocab sheet every page is literally changing how fast I'm picking up words. Way better than a dictionary."

- Amara K., ESL reader
★★★★★

"Scanned a page of 1984 and it immediately said it knew what book it was and started annotating with actual knowledge of the story. That was insane to me."

- Ryan T., 11th grade honors English
★★★★★★

"get a job"

- Aiden, 9th grade English student
FAQ

Common questions.

No. Photos are processed entirely on your iPhone using Apple Vision. Only the extracted text is sent to our server for AI annotation. Your images never leave your device.
Any physical book in any language. The model works on novels, textbooks, poetry, and non-fiction. For well-known titles, it will identify the book and ground annotations in the context of the full story.
PhotoLang includes AI annotations, page summaries, vocabulary sheets, quote analysis with MLA citations, multi-page scanning, book auto-identification, and support for 13 languages. All core features are available from day one.
Annotations can be generated in 13 languages: English, Spanish, French, German, Italian, Portuguese, Japanese, Korean, Mandarin, Arabic, Russian, Hindi, and Dutch. Select your language in Settings.
We're putting the finishing touches on it. Join the waitlist to be notified the moment it launches. Waitlist members get early access.
Early access

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