Polar Flow App setting up heart rate zones, the vibration function to help you stay in the zone and annotating heart rate traces
Polar Flow App setting up heart rate zones, the vibration function to help you stay in the zone and annotating heart rate traces
![PolarGlobal on Twitter: "Flow app iOS got updated with a new Diary view. You get the latest data and insight of your training, activity, recovery and sleep summarized. Flow app Android will PolarGlobal on Twitter: "Flow app iOS got updated with a new Diary view. You get the latest data and insight of your training, activity, recovery and sleep summarized. Flow app Android will](https://pbs.twimg.com/media/EnGouCbXUAEBbQ-.png)