Apples Calendar app has been on the iPhone since the start, and rarely gets changed. But in the last few months, Calendar has been the subject of some compelling upgrades. And now, iOS 18.3 adds a feature that provides another reason to use the app.Calendar got several rare upgrades in iOS 18Apples strategy with the Calendar app has always been a bit perplexing to me. The company knows that lots of iPhone users have been drawn away by alternative apps like Google Calendar, and even indie offerings like Fantastical.Yet the company has mostly left Calendar unchanged for years. Despite worthy competition, Apple has shown little interest in making its own app better.But thats started to change.iOS 18 came with some of the biggest Calendar changes I can remember seeing.And honestly, theyre not that bigbut for Calendar, they are.One of the most significant upgrades was the integration of Reminders into the app. You can now create, edit, and view all your reminders from inside Calendar.Its a great addition, albeit limitedId love to enable only certain Reminders lists, but currently its all or none.Beyond that major new feature, iOS 18 also brought:a refreshed design with several typography and UI improvementsand a new Month view that shows your event detailsOverall, for an app that seldom gets any attention from Apple, iOS 18s updates have been a very welcome surprise.And just this week, a small iOS 18.3 addition provides yet another reason to use the built-in Calendar app.iOS 18.3 provides a small addition for Calendar app usersIf you own an iPhone 16 model featuring Camera Control, iOS 18.3 provides a new advantage for Apples Calendar app.Long-pressing Camera Control opens visual intelligence, a recent addition that turns your iPhones camera into an AI-infused tool.With visual intelligence you can get information about whatever your camera sees, and in some cases even take action on it.iOS 18.3 adds a nice feature addition for Calendar users.Use visual intelligence to point your iPhone at a flyer, poster, or some other sign containing a calendar date, and iOS 18.3 will offer to add that event to the Calendar app.Its a quick, easy way to bring real-world info into your digital calendar.iOS lets you change default apps in a variety of categories, but calendar isnt one of them.Which means the new visual intelligence feature will only work with Apples Calendar app.Its a relatively small addition, but also yet another new reason to stick with the built-in Calendar.Do you use Apples Calendar app? What do you think of the recent changes? 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