Go to your profile.
Click on gear icon to access settings.
Click on "Water Reminders"
Click on "Push Notifications"
Select from 0 - 5 notifications a day.
If you are doing this for the first time or did not allow push notifications a pop up with appear, and you will need to click "open settings"
Within settings in your phone it will open your notifications and you will need to turn them on for Hidrate Spark.