Hacker News Reader

It's compatible with Paper, the iOS app. I didn't get it at first either, but then it clicked.

Took me awhile. Not having an iPad, I had no clue what "Paper" was until 5 minutes ago.

No, it's clearly stated that this pencil is compatible with Paper. Paper is an iOS app, therefore this product is compatible with the iPad family.

See the Frequently Asked Questions at http://shop.fiftythree.com/