Expensive equipment is not really a requirement for potty training. In my experience, all you need is a toilet.
At least, that's all I needed for the first two.
I know it's possible to potty train without a fancy phone, but now I also know that having a camera in my back pocket at all times sure does come in handy when trying to motivate a 2 year old to stay seated until he finishes his business. Especially when that two year old is most easily entertained by his own silly faces.