It's easy to edit an existing standing order or scheduled payment from the app. Just go to the Scheduled tab in the Payments section, tap on the payment you want to edit, then tap the three dots (Android) or 'Manage' (iOS) in the top right and 'Edit payment'. You'll be able to edit all the details of the payment such as the amount, reference, date and frequency. Just tap 'Save' when you're done, and the payment will be updated.