Can I write by hand in GraphNotes on iPhone Duo?
Yes, with Apple Pencil (USB-C) on either display. Apple added Pencil support to iPhone Duo in an update after launch, so if your Pencil does not write, update iOS.
Other iPhones do not work with Apple Pencil, so there GraphNotes shows the handwriting you wrote on your other devices but cannot take new handwriting. You can still read, highlight, type, link and search. iPhone support is new, and handwriting on iPhone Duo is the least tested part of the beta.
Last updated November 11, 2026.
GraphNotes is free and in public beta on TestFlight. Join the Beta.