You can customize how many notifications you receive from the app and the frequency with which they're sent.
Please select the Account icon on the Dashboard (bottom right corner) and select the dropdown next to My Stats. Then, select My Reminders where you can customize what reminders you would like to receive, how many, during which daily intervals and on which days to see them. Don't forget to click Apply Changes at the bottom the page to save (see screenshots below)!
NOTE: You will not receive any notifications if your device's settings does not allow them. Check this article for more details: I am not receiving any notifications!