Having the ability to beam images from a camera to a smartphone or tablet is convenient for a variety of reasons ranging from remote control away from the camera to the ability to review images with clients on a large screen. Camera manufacturers included WiFi features in their products many years ago, but most of these solutions are awkward at best. The process to hook up a device is often unnecessarily involved and the set of included features not fit for professional use.
Camranger stepped into this gap many years ago and developed a wireless bridge that attaches to the camera and comes with a well thought-out app. It has been a standard industry solution for quite some time, but unfortunately it was not Fujifilm compatible until 2019. I just learned a few weeks ago that my cameras are finally supported and ordered one right away.