Unfortunately, there’s no single true active stylus that works natively with both your iPad Pro 5th gen and your iPhone 15 Pro Max in the same way your Apple Pencil does on the iPad. The reason is that Apple Pencil technology relies on a special layer in the iPad’s display that the iPhone simply doesn’t have. So while your iPad can talk to an active stylus using Apple’s proprietary protocol (for pressure sensitivity, tilt, and palm rejection), your iPhone will treat any pen as a simple capacitive touch input.
That means for your iPad, the best choice remains the Apple Pencil 2nd generation. For your iPhone, the “active” pens you see on Amazon are usually battery-powered capacitive styluses—these mimic a finger tap but can have a fine tip for precision. Popular options for iPhone include the Adonit models, which can switch between active iPad mode and capacitive mode for other devices. They won’t give you true pressure sensitivity on the iPhone, but they can offer a more pen-like experience with better accuracy than a rubber-tipped stylus.
