ApprovalMax sends out two types of email notification:
New requests, comments (instantly)
Summary of open requests (daily)
This is how you can switch off notifications:
Click on your Avatar in the top right-hand corner and select "My profile".
In My profile, you will find the section about email notifications. You can toggle the status for each notification type by clicking on . As a result, the button turns grey and the respective notifications are switched off.