The IOS and Android KAT app is free to download.  With a KAT App you can access this Help Center and learn more about KAT training.  However,  KAT training does require a KAT device.
See also: What functions on my mobile device does the KAT app require?

The will require access to Bluetooth, Camera and Location on the mobile device. Wifi is NOT required for KAT training after you have set up your user id.