Auxiliary Charms: Can be attached to any devices with auxiliary ports.
Lightning Dust Plug Charms: Typically for iPhone/iPad. iPhone 15 and newer iPads have a USB-C port.
USB-C: iPhone 15, Newer iPads, Samsung, Google, Switch, and New Kindle Models, such as 11th gen.
Micro USB: Typically pervious Kindle models and Kindle Oasis.