Notes in the margin of every PDF.

A pin is a whole notebook.

Type in it, draw in it with Apple Pencil or a finger, and keep drawing: when you get near the end, a new page opens below. Add a checklist, a photo, or your voice. Snip a figure off the page and draw on top of it.

• Typing
• Apple Pencil
• Handwriting to text
• Checklists
• Photos
• Voice
• Snipped figures

Give a pin a kind, so you see what it is from across the page: Note, Question, Idea or Action.

One pin for the whole book.

Some thoughts are not about one page. The book pin holds them: the questions you bring to the book, a to-do list, a note to read later. It stays on screen as you turn pages, wherever you drag it.

Read faster, with a guide.

Speed reading lights the words in front of your eyes and moves at your pace. Your eyes follow the light, and stop going back over lines you already read.

Four styles

Light the line, a group of words, or both. Or show the words large in the middle of the screen.

Your pace

Set the words a minute, and change it in steps of 5, 10 or 25. Tap the right edge of the page to read faster, and the left edge to read slower.

Start anywhere

Tap a line to start there. Tap the lit line to pause.

All your books, on all your devices.

Helicon keeps your library in your own iCloud. Add a paper on your iPad, and it is on your iPhone too, with your pins, highlights and notes. No account to make, and no server of ours in between.

Remember what you read.

Review brings your pins back a few days later and asks your own questions again, so you remember what you read. Find searches the author's words and your own. Export a book's notes as Markdown, for your notes app.

• PDF and EPUB
• Text from scanned pages
• Your place and zoom, kept
• 4 light and 4 dark page themes