Hi, I am a co-founder at Matician. Understand your POV. We've all been there.
I can tell you that privacy was a priority for us, so we've designed it from Day 1 to do all processing on the device. The map data from robot is communicated to app via local wifi.
We don't need an internet connection. We have designed it so that it can work like old applianced. However, we need local wifi to transfer map data to the app. Bluetooth isn't good for that.