A Canvas for every highlight
Group highlights into cards, connect them with arrows, add sticky notes, sketch with ink and record voice notes. Your page stays one tap away, side by side or tucked aside for a full-screen Canvas.
Duet PDF Reader
Read closed.Think open.
Duet is a PDF reader built for the moment reading turns into thinking. Read and highlight your PDF, and each highlight gets its own Canvas, where ideas take shape. Leave, come back, and you’re on the exact line you left.
Made for iPhone Duo. Optimised for iPhone 18 Pro.
No laptop needed. The thinking now happens on your phone.
Private AI that works offline
Ask about any passage and pin the answer to your Canvas. Duet’s AI runs on Apple Intelligence: on your phone with no internet needed, even on a flight, or on Apple’s Private Cloud Compute for deeper answers across a whole document. You choose in Settings. Every answer comes from your document, and in on-device mode nothing leaves your phone.
Made for iPhone Duo
Read closed, think open. Unfold Duo and the page and its Canvas sit side by side. Closed, open, half-folded like a book, portrait or landscape: the layout adapts to the hinge and every feature stays. Tools move to the side, within thumb reach.
Optimised for iPhone 18 Pro
The full experience on one screen. Move between your page and its Canvas in a tap, with every feature included: Canvas, voice notes, private AI and widgets.
See your progress at a glance
Every PDF shows its page and highlight count, so you know what you’ve read and what still needs thinking. One column closed, two columns open.
Widgets
- Continue Reading: an extra-large bookmark that opens the exact line you left
- Highlights: your latest highlights at a glance
- Recent PDFs: your newest documents, one tap away
One-time purchase. No subscription, no account, no ads.