Apples push to make the iPhone more customizable and personal has brought a new iOS 18.4 feature: now there are two new categories for setting default apps, depending on where you live.Translation default available broadly, while Navigation is limited to the EUApple has offered some form of default app controls in the Settings app for years. But recently in iOS 18.2, the feature expanded with new categories and a dedicated hub.Now in iOS 18.4, the category options are growing again.Translation is a new category available in the US and abroad, letting you change the default from Apples Translate app to a third-party option like Google Translate.And if youre in the EU, youll see a second long-anticipated addition: Navigation.Its a shame that Navigation is restricted to EU users, but if you do happen to live in the EU youll be able to change your iPhones default from Apple Maps to another option, such as Google Maps.Default app categories all work a bit differently, but generally speaking, your default app will be used by links and built-in OS tools you encounter system-wide for performing a certain function.For example, if you change your Navigation default to Waze, tapping an address your friend sends you in an iMessage should open that location directly in your preferred app.Default apps can be configured on your iPhone by opening Settings Apps Default Apps.Do you plan to change default apps in iOS 18.4? 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