iPhone Duo
Finally, a phone that opens like a notebook.
So we made a notebook that opens like one too. Penna was sketched around iPhone Duo from the very first page.
One notebook, three ways to hold it.
Closed
One page on the outer screen, for the shopping list you just remembered.
Half open
The page stands up on top while your tools and pages wait underneath.
Open flat
A proper two-page spread. One tap makes it a single big page, and Penna remembers which you prefer for each notebook.
Keep a page open for reference
Choose Refer To and any page from any notebook or PDF sits on the left half, read-only, while you write on the right. Slides beside your notes, the brief beside the sketch, the recipe beside the shopping list.
The Library splits at the fold
Open flat, Recent, Favorites and your folders sit on the top half and the covers on the bottom. Thumbs on either side, everything one tap away.
Your finger is a pen
On iPhone, your finger writes. With no pressure to go on, Penna watches your speed instead: quick strokes come out fine, slow ones come out full. It feels more natural than it has any right to.

Write it down. Then find it again.
Penna arrives on iPad, iPhone and Mac this fall. Leave your email and we'll send you exactly one message: the day it's out.