NatWest

NatWest’s Round Ups can turn a £4.20 card purchase into an 80p savings transfer. A three-times multiplier would put £2.40 aside instead. These are transfers of the customer’s own money from a current account to a chosen eligible instant-access savings account.

Open the current account in the app, tap the three-dot menu, then select Round Ups. Choose the savings arrangement and multiplier. The feature applies to sterling debit-card and contactless payments, including pending payments when it is switched on. Amounts for purchases clearing on the same day are grouped into one transfer, which can take up to four days.

The app will skip a round-up that would take the account into overdraft. On a joint account, the setting follows each person’s debit card, so both holders must enable it if both sets of purchases should contribute. My Round Ups shows monthly and yearly totals; switching the feature off and on resets the displayed yearly total.

The Select account

Select has no monthly account fee. An optional overdraft carries interest, with a representative variable rate of 39.49% EAR; it requires separate approval. Applicants must be UK residents aged at least 18. Online opening can require photo ID matched to a selfie and additional proof of address.

Alongside saving, the app offers favourite payees and views of linked accounts from other banks. Standing-order management, payment notifications and spending views help handle recurring commitments.