Google Photos is one of Google's best efforts. The cloud-based service not only backs up photos, but taps into Google Assistant for help creating collages, albums, and more. The new Google Photos Library API will allow developers to port Google Photos, with all its tools, into their own application.
Apple today updated its four core operating systems (iOS, macOS, watchOS, tvOS) with a wide range of new features for end users. Less clear is how developers will put the new functionalities to use in their own apps. Mention of new APIs and SDKs were largely absent from the keynote.