Using the Mobile App:
You cannot currently schedule payments on the Mobile App.
Using the Web Portal:
Log in to the Web Portal
Click on Payments & Transfers
When you fill in the details to complete a transfer, you have the ability (at the end of the form) to schedule the payment by checking the box Schedule Payment.
Choose date and time
Click Continue
Individual accounts are currently linked to the platform you are signing up with, this means that if you signed up/logged in via the App you can only access through the App, same for Web portal.