🎯 Feel calm and focused naturally
Set your pace
Create, save and sync your personalized rhythms using the free doppel app available for both iOS and Android.
Use the doppel app to take your resting heart rate then try the five preset rhythms to feel relaxed, calm, focused, alert or energized. You can edit these presets, or create your own rhythms. Sync two rhythms at a time to the doppel wristband via Bluetooth.
► DOPPEL - Feel calm and focused naturally
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