With iOS 19 expected to be unveiled in June 2025 at Apple's Worldwide Developers Conference (WWDC), rumors about its features have been coming in fast. Although none of these rumors can be confirmed at the moment, they still give us a good idea about what Apple might be considering behind the scenes. Since AI is the flavor of the month, Apple Intelligence improvements are expected for iOS 19, but the camera app might also be getting some attention. Here's everything that's been leaked so far.The merging of Siri and Apple IntelligenceAccording to Bloomberg's Mark Gurman, Apple plans to merge Siri with Apple Intelligence sometime during the iOS 19 patch cycle. Yes, the assistant is currently listed as being part of Apple Intelligence, but behind the scenes, it's supposedly got a new LLM in the works that would unify its currently split architecture and allow it to more frequently handle complex requests. As of now, its AI features are much more limited, and most of Siri doesn't use AI at all.Gurman says he expects the merger to be completed by spring of 2026 with the launch of iOS 19.4. His report states that, originally, Apple's plan was to launch a more conversational Siri in the same update, but that's been delayed and is not expected to be unveiled at WWDC 2025.Gurman also indicates that because Apple has not yet completed last year's Apple Intelligence feature rollout, any as yet unannounced features shouldn't be expected for a while.A Camera app redesignAbout a month ago, YouTuber FrontPageTech revealed a leaked redesign of the iPhone's Camera app. He claimed to have seen a video of the rumored redesign and recreated it for a video. The render primarily focuses on the control system. Instead of swiping left or right to switch between camera modes, this leak indicates that we may see just two options when we open the appphotos and videos. Swiping switches between them, while tapping reveals more options such as panorama or spatial videos. You can also see a slightly larger viewfinder in the render, but all of this should be taken with a pinch of salt. Even if the sources are credible and the information accurate (other leakers have doubted FrontPageTech before), a lot can change between now and release. Features get shifted around all the time during development, and you can expect some of that with iOS 19 as well.No major UI changesThe FrontPageTech leak also suggests that Apple won't be making other major UI changes in iOS 19. With iOS 18's development not yet complete despite WWDC 2025 being right around the corner, I do have to agree that looks unlikely that big UI changes would follow so soon.Your iPhone will (probably) run iOS 19With no major UI redesign expected, there's no reason for Apple to axe more phones from the iOS 19 update lineup. Citing a source within Apple, French website iPhoneSoft.fr reports that any phone that runs iOS 18 should be compatible with iOS 19 as well. However, the iPad 7 will supposedly not be so lucky, as the website says it will not be included in the iPadOS 19 update.