You can use Apple Pay to shop with your debit and credit cards in-app, online or in almost any physical store in the world accepting Apple Pay contactless payments. Also, there’s no limit on the value of Apple Pay transactions, however, some merchants apply the contactless limit and only accept payments up to £30 (or £45 from April 1st, 2020). There’s no limit for transactions made in-app or via the Safari browser.
In addition to the limits mentioned above, all of your transactions using Curve with Apple Pay will still be subject to your Curve spending limits. You can read more about your spending limits with Curve here.
Please also note that if you lock your Curve Card in the app you won’t be able to make payments with Apple Pay.