To update the SundayPay app on your payment terminal or handheld:
Open the SundayPay app.
Tap the Settings icon (the small gear in the top right corner).
You will see the current version of the app. If the "Update" button appears, click it to start the update.
You have now the latest version, if you want more infos about the configuration of your PDQ, you can look at this collection : Configuration and Installation.
Last Reviewed: 09/03/2026