PDFCAT: PDF Viewer, AI Summary

PDFCAT is a PDF viewer that's light, fast, and summarizes right on your phone.
Pay once and you're done: no ads, no subscription, no sign-in.

■ LIGHT
Only what you need. No account, no cloud sync, no first-run tutorial.
Runs comfortably even on older, low-end phones.

■ FAST
Pick a file and it opens. Native rendering keeps scrolling smooth, even in
documents with hundreds of pages. When a file opens, a green screen shows the load
time and page count. When it can't, a red screen tells you why. No more staring at
a blank white screen.

■ AI SUMMARY, ON YOUR PHONE
Turn a long document into 3 key points. Summarize the whole document or just the
page you're on. Summaries are made entirely by the AI built into your phone
(Gemini Nano). Your document is never sent to a server, and it works without an
internet connection. Share a summary along with the file name in one tap.

※ Supported devices for AI summaries (please check before you buy)
AI summaries need a recent high-end device with on-device AI (Gemini Nano):
- Samsung: Galaxy S25 series, S26 series, Z Fold7 / Z Flip8 and later
- Google: Pixel 9 series and later
- Some other recent models, such as OnePlus 13 and Xiaomi 15
Google keeps adding devices to this list. The AI model may need a one-time
download (Wi-Fi recommended). On other devices, every feature except AI summaries
works as usual.

■ MAKE PDFCAT YOUR PDF APP
On first launch, PDFCAT asks whether to open PDFs with it. Set it once, and tapping
a PDF in your file manager or messenger opens PDFCAT straight away.

■ SEARCH INSIDE THE DOCUMENT
Find words in a PDF, see them in context, and tap to jump to that page.
Type a number to go straight to that page.

■ PAGE THUMBNAILS · PICK UP WHERE YOU LEFT OFF
Find your spot with real page thumbnails. Reopen a file and you're back on the
page you were reading.

■ PASSWORD-PROTECTED PDFS
Enter the password and open it on the spot. Saving the password is optional, and
it's kept only in your device's secure storage.

■ RECENT FILES DON'T DISAPPEAR
PDFs you open are kept inside the app, so they reopen from your recent list even
if the original is deleted. Don't want that? Just turn off the KEEP switch.

■ TABLETS · DARK MODE
On large screens, PDFCAT switches to a two-column layout with a thumbnail sidebar.
Dark mode follows your system setting, or switch it yourself.

■ NO ADS · NO TRACKING · NO ACCOUNT
PDFCAT collects no personal data. The files you open never leave your device.

Recent changes:
Welcome to PDFCAT
- A light PDF viewer that opens the moment you tap
- AI summary: 3 key points, made on your device (supported devices only: Galaxy S25, Pixel 9 or later, etc.)
- In-document search · page thumbnails · resume reading · password PDFs · dark mode
- Set PDFCAT as your PDF app on first launch