Apples last big software update, iOS 18.3, arrived in late January. Although were still waiting for the first iOS 18.4 beta to drop, Apple has already provided a very narrow window for when the public iOS 18.4 version will launch. Heres what to expect.iOS 18.4 coming in early April per AppleIts unusual for Apple to share timelines for software release dates far in advance, but iOS 18.4 is one of the rare exceptions.All the way back in October, when the first Apple Intelligence features launched, the company mentioned that an April software update would bring additional AI languages.Based on previous years software patterns and Mark Gurmans reporting, it became clear that iOS 18.4 would be that April software update.But now, Apple has gotten even more specific.Based on updates made to its website, Apple has now pinpointed early April as the exact timing for iOS 18.4s launch (via MacRumors).Heres copy from the official iOS 18 page:Apple Intelligence is available in betaAdditional features andlanguage support available in early AprilThe early qualifier still offers Apple some flexibility, but I would assume this means iOS 18.4 will launch before mid-month. The week of April 7 seems most likely, but Apple could potentially target a Monday, April 14 launch and technically still consider that early April. In any case, iOS 18.4s release will be here before long.New features expected in iOS 18.4For a while now, Mark Gurman has been reporting that some major Siri improvements are in store for iOS 18.4. Currently were still waiting on three major Apple Intelligence upgrades for Siri, including:New app actions: Apple says Siri will be able to perform hundreds of new actions in Apple apps, without the need to ever open those apps. App Intents will bring the same capability to supported third-party apps, too.Personal context knowledge: Like a real-life assistant, youll be able to reference texts you received, past calendar events, and more personal data to get truly intelligent assistance from Siri.Onscreen awareness: Siri will know whats on your display, so you can easily ask it to take action on whatever youre looking at.Though Gurman has been consistent on the expected inclusion of these features in iOS 18.4, very recently he cast doubt on their inclusion.Last week he wrote:Apple is considering delaying or limiting at least some of the [Siri] overhaul until iOS 18.5, which will be released as early as May, the people said. []Inside Apple, many employees testing the new Siri have found that these features dont yet work consistently. And its nearing crunch time for the software to be ready. So its unclear whether iOS 18.4 will still include some Siri improvements or not. I wouldnt be surprised if we get some new features, while certain capabilities get pushed to iOS 18.5.Beyond that, iOS 18.4 is expected to include several other AI improvements such as a priority notification feature, a new style for the Image Playground app, and more.Are you excited for iOS 18.4s release soon? Let us know in the comments.Best iPhone accessoriesAdd 9to5Mac to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Mac experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel