The Watch Connectivity framework (WatchConnectivity.framework) provides a two-way communications conduit between an iOS app and a WatchKit extension on a paired Apple Watch. Apps use this framework to pass files and data back and forth. Most transfers happen in the background when the receiving app is inactive. When the app wakes up, it is notified of any data that arrived while it was inactive. Live communication is also possible when both apps are active.

The Address Book UI framework provides controllers that facilitate displaying, editing, selecting, and creating records in the Address Book database.

The Contacts framework provides Swift and Objective-C API to access the user’s contact information. Because most apps read contact information without making any changes, this framework is optimized for thread-safe, read-only usage.

ironSource builds discovery, engagement, monetization and anayltics tools for app developers, device manufacturers, mobile carriers, and advertisers.

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.

The AWS Mobile SDK helps you build high quality mobile apps quickly and easily. It provides easy access to a range of AWS services, including AWS Lambda, Amazon S3, Amazon DynamoDB, Amazon Mobile Analytics, Amazon Machine Learning, Elastic Load balancing, Auto Scaling and more. The AWS Mobile SDK includes libraries, code samples, and documentation for iOS, Android, Fire OS, and Unity so you can build apps that deliver great experiences across devices and platforms.

Amazon Simple Storage Service (Amazon S3) is object storage with a simple web service interface to store and retrieve any amount of data from anywhere on the web. It is designed to deliver 99.999999999% durability, and scale past trillions of objects worldwide. Customers use S3 as primary storage for cloud-native applications; as a bulk repository, or "data lake," for analytics; as a target for backup & recovery and disaster recovery; and with serverless computing. It's simple to move large volumes of data into or out of Amazon S3 with Amazon's cloud data migration options. Once data is stored in S3, it can be automatically tiered into lower cost, longer-term cloud storage classes like S3 Standard - Infrequent Access and Amazon Glacier for archiving.

A software library to view analytics, measure ad performance and build audiences for ad targeting within the Facebook framework.