The company is Qardio. The device is the QardioArm.

This exact thing happened to me yesterday. I woke up, tried to use the blood pressure monitor for the first time in months, and was signed out of my account in the app with no way to log back in because the server is now offline. I went to reddit and tried their suggestions, but nothing worked.

I looked for an open-source app that might be able to interface with the QardioArm, but no luck. It’s just junk now. I knew this was a risk when I bought it, and I did get around 4 good years out of the product, but what a damn waste.

Make this illegal already.