StressFace: HRV Stress Tracker

Is there a way to get a notification when my stress level reaches a certain threshold?

I really like how this app looks on the Apple Watch. But I also have an oura ring. I got this app before oura came out with a stress reading. Today in the afternoon I worked and I also had downtime. The oura ring Showed how the stress level went up and how it dropped. This app showed no change the entire afternoon. So I’m giving up on the app.

This app is confusing. It seemed to be working fairly well for the money. It was tracking my stress level seemingly accurate. Then I stumbled upon the "calibration" area. There's really no instruction on how to use this except saying to set it at your current stress level. Which I did. "1" Now it's been at "1" for hours. Last night I accidentally set it at "9" and it stayed at "9" all night long. I know I wasn't at a "9" stress level all night long. So, am I doing it wrong? Am I not understanding how to calibrate? Good question - no answers because there's no proper instruction on how to do this. Please help.