I have a similar machine I got for my recovery after knee replacement surgery. It doesn’t connect with your smartphone, but you can using it standing up or sitting down. I only use it while sitting, and I can get it going fast enough to get a little winded after a while. It’s quiet, so you could still hear TV or use it at work without disturbing other people. And it only costs $81 instead of $350. It has some plastic shielding on the outside, but based on the weight of it, it seems to be mostly metal.