Hi @Emrob421! According to the Charge HR Help Page, the Alta HR "can alert you to incoming calls, texts, and calendar events from your nearby mobile device. If you feel a vibration while your screen is dimmed, turn your wrist towards you or double tap your tracker within one minute to see the notification. The notification is only visible on your tracker for one minute."
It looks like it will NOT show notifications from Snapchat or FB.
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