iOS 10 is the tenth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 9. It was announced at the company's Worldwide Developers Conference on June 13, 2016, and was released on September 13, 2016. It was succeeded by iOS 11 on September 19, 2017. iOS 10 incorporates changes to 3D Touch and the lock screen. There are new features to some apps: Messages has additional emojis and third-party apps can extend functionality in iMessage, Maps has a redesigned interface and additional third-party functions, the Home app manages "HomeKit"-enabled accessories, Photos has algorithmic search and categorization of media known as "Memories", and Siri is compatible with third-party app-specific requests, such as starting workouts apps, sending IMs, using Lyft or Uber or to use payment functions. Reviews of iOS 10 were generally positive. Reviewers highlighted the significant updates to iMessage, Siri, Photos, 3D Touch, and the lock screen as welcome changes. The third-party extension support to iMessage meant it was "becoming a platform", although the user interface was criticized for being difficult to understand. Third-party integration in Siri was "great", although the voice assistant was criticized for not having become smarter than before. Reviewers were impressed with the image recognition technology in Photos, although noting it was still a "work in progress" with a higher error rate than the competition. 3D Touch "finally feels useful" and "works in almost every part of the OS". The lock screen was "far more customizable than before", and reviewers enjoyed that notification bubbles could be expanded to see more information without needing to unlock the phone. A month after release, iOS 10 was installed on 54% of iOS devices, a "slightly slower migration" than for the release of iOS 9, speculated as being caused by an early release issue that may have "put some [users] off downloading the update". User adoption of iOS 10 steadily increased in the following months, eventually totaling 89% of active devices in September 2017.