Update: The March 2022 update has ruined the app. The app constantly drops connection during the workout and says it's 'searching for device'. Also, when I complete the workout and come out of 'My Tile', the app processes the workout, asks me to label my activity and finalises it as it normally would, but then, despite having removed my belt, it continues to chart my last heart rate whilst the app is open, lengthening the workout and making it inaccurate. I have no clue why it does this.