Best Round-Up and Auto-Savings Apps in the UK

Picking a round up savings app UK side is the easiest way to build a pot without feeling it. Every time you spend, the app rounds the transaction up to the nearest pound and sweeps the spare change into savings. Buy a coffee for £2.60 and 40p moves across. Pay £12.75 for lunch and 25p is saved. On its own that sounds trivial, but spread across a month of card taps it adds up to a quiet, steady habit that most people never notice leaving their account.

This guide compares the apps worth your time in 2026, splits them into the ones built into your bank and the standalone apps that link to any account, and explains how the saving and interest actually work so you can pick the right one.

Two kinds of round-up saving

There are two routes, and the difference matters.

Built into your bank. Monzo, Starling and Revolut all round up your spending inside the same app you already bank with. The spare change drops into a savings pot or space without any third-party connection, and because the money sits with the bank itself it stays under the same protection as the rest of your balance.

Standalone apps that link to your account. Plum, Chip and Moneybox connect to your existing current account through Open Banking, read your transactions, and save on your behalf. You can use these alongside any high-street bank, which makes them the obvious choice if your main account does not have a round-up feature of its own.

Neither route is automatically better. If you already bank with Monzo or Starling, their native round-ups are the simplest possible start. If your everyday account is with a big high-street bank, a standalone app fills the gap and usually adds smarter saving on top.

The best round-up and auto-savings apps

Plum

Plum is the strongest all-rounder for hands-off saving. Alongside classic round-ups, its automated “set asides” study your income and spending and move small, variable amounts into savings on a schedule, so you are not relying on round-ups alone. Money earmarked for saving can sit in an interest-paying easy-access pocket, and Plum also offers a Cash ISA and investing options once you want to go further. The interest rate on the easy-access pocket is variable and depends on which plan you are on, so check the current rate in the app before you commit. Plum has a free tier plus paid tiers that unlock higher rates and extra features.

Chip

Chip leans hardest into interest. It offers round-ups and automatic saves, but the headline draw is its easy-access savings account, which has consistently sat near the top of the app-based savings tables. Rates are variable and new-customer boost rates often expire after twelve months, so read the rate breakdown rather than the headline figure. If your priority is a competitive return on the cash you round up rather than investing it, Chip is the one to look at first.

Moneybox

Moneybox started as a round-up app and grew into a full savings and investing platform. It is the only app here that offers the complete ISA range: Cash ISA, Stocks and Shares ISA, Lifetime ISA and Junior ISA, plus personal pensions. Round-ups can feed a simple savings account or, if you choose, a Stocks and Shares product where your spare change is invested. That makes Moneybox the pick if you want round-ups to do more than sit in cash, though investing carries risk and is best left for money you will not need soon. See our Moneybox review for the full breakdown.

Monzo

If you bank with Monzo, turning on round-ups takes seconds. Spending is rounded up automatically and the difference drops into a Savings Pot, where it earns variable interest. Because it is all inside one app with no external connection, this is the cleanest option for existing Monzo customers. Our Monzo review covers whether it is worth making your main account.

Starling

Starling’s round-up feature, paired with its Saving Spaces, works the same friction-free way for Starling customers. You can round up to the nearest pound and even add a multiplier so each round-up is doubled or more, which speeds the pot up without touching your budget.

How much do round-ups actually save?

Round-ups alone typically add up to somewhere in the range of a few pounds a week for an average card user, so think of them as the gentle baseline rather than the whole plan. The real gains come when you layer on the smarter features: Plum’s automated set asides, a round-up multiplier on Starling, or a recurring weekly transfer on top. The apps that let you stack round-ups with scheduled saves are the ones that move people from saving loose change to building a genuine emergency fund.

To see what your own spending would generate, try our round-up savings calculator and the savings goal calculator.

Is your money safe?

This is the question that should decide where your savings sit. Money held in an FSCS-protected savings account or Cash ISA is covered up to £85,000 per person, per banking institution, by the Financial Services Compensation Scheme. Where the apps differ is in how they hold your cash before it reaches a protected account.

With Plum, for example, money in an interest-paying easy-access pocket is held with a partner bank and is FSCS-protected, while balances sitting in a non-interest “primary pocket” are held as e-money and are not covered the same way. Always check, for any app, whether the specific pot your round-ups land in is an FSCS-protected deposit or an e-money balance. You can read more on the FSCS website and check any provider’s status on the Financial Conduct Authority register. For a deeper look, see is Plum safe? and are digital banks safe?.

Which round-up app should you choose?

• Already bank with Monzo or Starling: turn on their native round-ups first. It is free, instant and the money stays protected with your bank.
• Want the most automation: Plum, for its set asides that save beyond just round-ups.
• Want the best interest on cash: Chip, for its competitive easy-access account.
• Want round-ups to grow through investing or ISAs: Moneybox, for the full ISA and pension range.

Start with one, give it a couple of months, and check how the pot is building. The point of a round up savings app is that you set it once and let the habit run in the background.

Frequently asked questions

Do round-up apps work with any UK bank account? Standalone apps such as Plum, Chip and Moneybox connect through Open Banking and support most major UK banks and building societies. Monzo and Starling round-ups only work if you bank with them directly.

How much can you realistically save with round-ups? Round-ups alone usually add a few pounds a week for an average spender. You save far more by combining round-ups with automated or scheduled transfers, which most of these apps support.

Are round-up savings apps safe to use? The Open Banking connection is read-and-save only and regulated, so the app cannot spend your money. The key safety check is whether the pot your savings land in is FSCS-protected or held as e-money; confirm this in the app before you save large sums.

Do round-up apps charge a fee? Some have a free tier and charge for premium features or higher interest, while bank-native round-ups on Monzo and Starling are free. Check the current plans in each app, as features and tiers change.

Is the interest from a round-up app taxed? Interest counts towards your Personal Savings Allowance like any other savings interest. Most basic-rate taxpayers can earn up to £1,000 of savings interest tax-free each year. See our guide on savings interest and tax.

Can I move my round-up savings out whenever I want? Easy-access pockets and savings pots let you withdraw on demand, though some request a same-day cut-off time. Money invested through an app, such as a Stocks and Shares product, should be treated as longer-term and can fall as well as rise.