Zippity-Split for iPhone is in development. This page is where the App Store link will live the moment it is ready.
Only the person holding the receipt needs the app. Everyone else joins by scanning a QR code and claiming their own items in their phone's browser — iPhone included, today, with nothing to install and no account to create.
So if a friend is already hosting, your iPhone works right now.
Want to know when it lands? Send us a note and we'll tell you once.