This article summarizes the key developer-related features introduced in iOS 8.1. This version of the operating system runs on current iOS-based devices. In addition to describing the key new features, this article lists the documents that describe those features in more detail.
For late-breaking news and information about known issues, see iOS 8.1.1 Release Notes. For the complete list of new APIs added in iOS 8.1, see iOS 8.1 API Diffs.
The PassKit framework adds support for payment passes and payment requests. Payment requests let users securely provide you with their payment and contact information to pay for physical goods and services. Payment passes are added to Passbook by payment networks, such as credit card issuers and banks, and let the user select their account on that payment network to fund payments.
For more information, see Pass Kit Framework Reference.