Tl;DR pay and maintain app and server, terrible privacy and security, onboard electronics compromise longevity.
They need to pay for the server too.
These things tend to be horrible from a privacy and security standpoint. Here is the Exodus Report. 5 different trackers, 20 permissions including location. One of the permissions is Bluetooth, so maybe it can be controlled stricly through that. The app itself may need to phone home though.
The motherboard will probably go bad before the motor does, the chances of it being NLA (no longer available) are high.
That’s when I buy it on Craigslist for $20, or a neighbor asks me to fix it. I can’t get parts so I take out the display and put a temperature controller in, a master on/off switch, one for the scale, and hope I can directly switch the speeds without putting a speed controller in too. Then all the individual functions are back but without process steps, or internet connectivity.
If you need to fix one of these outside of warranty, and cannot do it yourself it is probably cost prohibitive, that’s even if parts are available.
I would look at the warranty validity, and if there is a separate support/ update period for the app/server.