When can I use doppel?

You can use doppel any time you want to feel calmer, or when you want to feel more focused. Perhaps you want to stay calm during an important presentation or relax at the end of the day. Or maybe you want to feel more awake during an afternoon meeting or when you’re working towards a deadline.

Slower rhythms are calming, and faster rhythms help you feel more focused. Use the app to take your resting heart rate and create rhythms based on your own physiology.