If you need to receive notification without voice alert in workouts, please refer to steps below:

For iOS Devices:
Notification reminder:
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  1. Click Settings
  2. Press Notifications
  3. Turn on Allow Notifications​ 
  • ​Note: Please also turn on all parts under this section
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        4. Open App
        5. Press Volume button(-) on the left side of your iPhone to reduce the voice volume to minimum