Render advanced 3D graphics and perform data-parallel computations. Get fine-grained access to the GPU while minimizing CPU overhead. The Metal Framework provides extremely low-overhead access to the GPU, enabling incredibly high performance for your sophisticated graphics rendering and computational tasks. Metal eliminates many performance bottlenecks—such as costly state validation—that are found in traditional graphics APIs. Metal moves all expensive state translation and compilation operations out of the critical path of your most performance sensitive rendering code. It provides precompiled shaders, state objects, and explicit command scheduling to ensure that your application achieves the highest possible performance and efficiency. Graphics, compute, and blit commands can be used together seamlessly and efficiently. Metal is specifically designed to exploit modern architectural considerations, such as multiprocessing and shared memory, to make it easy to parallelize the creation of GPU commands.

This collection of documents provides the API reference for the Quartz Core framework, which supports image processing and video image manipulation.

Use the Core Telephony framework to obtain information about a user’s home cellular service provider—that is, the provider with whom the user has an account. Carriers can use this information to write applications that provide services only for their own subscribers. You can also use this framework to obtain information about current cellular calls.

The Firebase iOS framework for adding realtime data synchronization to your app.

A collection of source from different Google projects that may be of use to developers working other iOS or OS X projects.

Protocol Buffers (a.k.a., protobuf) are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data.

StoreKit enables users to embed a store in their app. It also process financial transactions associated with the purchase of content and services.

Core Text is an advanced, low-level technology for laying out text and handling fonts.

The AV Foundation framework provides an Objective-C interface for managing and playing audio-visual media in iOS and OS X applications.