Echo Meter Touch 2 and 2 PRO modules for Android have either a Micro-USB or USB-C plug, depending on the date of manufacture. The Micro-USB module is incompatible with any and all Apple devices.
As for USB-C models, we are currently waiting for Apple to define what is required to design an accessory for USB-C, so we do not have a definitive answer at this time. It is possible that the USB-C EMT will not work with iOS products as there are other requirements besides hardware compatibility. However, we will be researching this and will be sure to let you know if/when we have a solution for iOS.
For now, the only iOS devices that are compatible with an Echo Meter Touch product are those built with a Lightning socket (see our iOS compatibility list), which are discontinued permanently. Echo Meter Touch 1, 2, and 2 Pro devices built with a Lightning plug and designated for use with iOS are compatible with these iOS devices.