The linked article only covered Canon and Nikon, but yes, most modern digital cameras can be connected and controlled via a phone, either Android or iPhone.

Most of these are officially supported by various camera vendors. For example, Sony supports an app called "Image Edge Mobile." Fuji cameras have "FUJIFILM Camera Remote." Panasonic has "LUMIX Sync App." But there are many third-party apps you can use, as well.

I am most familiar with the app that Olympus provides and supports, called "OI.Share." It lets you remote-control, review, edit, and geotag images taken on your Olympus (or OMDS) cameras, as well as gives you phone access to the complete user manual. This via WiFi, which most cameras have had for some years now.

In fact, Olympus made a camera called "Olympus Air" that had almost no user interface at all — you could only change its settings via a phone app! (It has an on-off button and a shutter button, and that's about all. You can use it without a smart phone by pre-configuring it, then pointing it at things blind, and pressing the shutter button. It works fairly well that way with a fisheye or ultra-wide angle lens.)