I usually jump on the beta builds on my iPhone 15 Pro every summer when WWDC rolls around. Once the official iOS version is out, I’ll only go for RC or beta if there are some major new features or content, like when iOS 18.4 was in beta. Apple Intelligence’s visual intelligence on the iPhone 15 Pro through the action button or control center was a great example—it meant that 15 Pro users didn’t have to upgrade for it.
If you’re not too keen on beta testing on your main iPhone, especially if you’re worried about things like battery life, you might want to try it out on your iPad instead. My friend did that with his iPad Pro instead of his iPhone 13 Pro Max green because he wasn’t comfortable with beta testing on his iPhone or Apple Watch Series 6 due to the risk of not being able to downgrade. And hey, if you do beta test, make sure to back up your iPhone to Finder on your Mac BEFORE you update it. I always back up my iPhone 15 Pro to my MacBook Pro once a month.